The next morning.

Ningfu East Road Courtyard, an ordinary courtyard.

In the middle of the courtyard, a blackboard painted blackboard was filled with numbers that were very different from the Central Plains text.

Since the previous dynasty, the court has stipulated that the numbers in the account books must be written as "1, 2, 3, 4, 5, 5, 7, 8, 9, 2".

But the numbers on this blackboard are "1, 2, 3, 4, 5, 6, 7, 8, 9, 0".

Arabic numerals actually entered the Central Plains since the Tang Dynasty, but they have been ignored. Even now, there are no such "vulgar" foreign numbers used by people in the Central Plains.

However, Jia Qiang taught these to many people within the past six months.

There are twenty or thirty short couches in the courtyard, and there are Daiyu, Baochai, Xiangyun, Yingchun, Tanchun, Xichun, Baoqin, Ping'er, Youshi, You Sanjie, Qingwen, Xiaojiaoer, Xiaojixiang, Zijuan, Ying'er, Cuimo and the twelve opera officials. There are also eight female managers who were selected from the West Road Courtyard Corridor Hall, who were sensible and knowledgeable and helpful to Ping'er on weekdays.

"You can roughly do the addition, subtraction, multiplication and division within three digits. But you need to exercise more specifically how to apply it. There are more books like this in the guild hall on the West Road Inn, and you can do more practice. But mathematics is much more interesting than addition, subtraction, multiplication and division. Addition, subtraction, multiplication and division are just the simplest applications. There are also higher-level ones, such as chickens and rabbits in the same cage, with a total of 88 heads, totaling 244. Ask, how many chickens and rabbits are there?"

After Jia Qiang finished the question, he looked at the young and bright faces, full of thoughts, his eyebrows were entangled, and he couldn't help but smile happily.

After getting several eyeballs, he laughed and said, "What I teach you today is called the binary equation."

As he said that, he listed the equations on the blackboard, and then used the problem of chickens and rabbits in the same cage to break down the equations thoroughly.

Daiyu, Baochai, Tanchun, Xiangyun, Baoqin, Ping'er and others were smarter, and their eyes were shiny when they heard it.

They are not confused about the method of calculating. There are also questions about chickens and rabbits in the same cage in the Central Plains of "Sunzi Sutra".

However, the solution to the "Sunzi Jing Jing" is much more complicated. The calculation plan is that each chicken is "golden rooster independent", that is, standing with one foot. Each rabbit uses two hind legs and stands with two feet like a human. Therefore, half of the total number of feet appears on the ground, which is 244 to divide two, that is, 122. In the number of 122, the number of chickens' heads is calculated once, and the number of rabbits' heads is equivalent to two times. Therefore, the total number of heads is subtracted from 122 to 88, and the remaining one is the number of rabbits, that is, there are thirty-four rabbits, and of course there are fifty-four chickens.

But such an algorithm is really not something that many people can understand, and it is much more complicated.

As Jia Qiang taught, using Arabic numerals to list the equations and then substitute them into them, and the result can be easily calculated.

Of course, it's not easy.

For example, Yingchun looked confused. It’s not that she didn’t work hard, she really couldn’t understand!

Go is also a brain-based person, but why isn't it so difficult?

Seeing Jia Qiang smiling and looking at him, Yingchun said angrily: "Isn't it enough to calculate accounts and learn the previous addition, subtraction, multiplication and division? What's the use of learning this?"

Jia Qiang smiled and said, "The second aunt is really good. What's the use of learning this? Let me give you an example. For example, a group of embroidery needs to be added to the guild hall, with a total price of 358 taels of silver. One type of embroidery is pierced by a wealthy lady like our family, and one side costs eight taels of silver. The other type is embroidered by ordinary embroidery girls or nannies, and the other side only costs three taels of silver. Ask, how many squares do you need to collect in the first type, and how many squares do you need to collect in the second type?"

Seeing Yingchun's pair of apricot eyes as if she could already see a question mark, Jia Qiang laughed and said, "This question is treated as an after-class homework. You can go down and think about it. Teach these. For some people, it is to make it easier for you to be a better housekeeper in the future. People's hearts are separated from their belly. You must know more so that you will not be deceived easily. For others, learn more about it, and you can also take on great responsibilities in the future."

Tanchun said funnyly: "What big responsibility can they take on?"

It’s not that she looked down on those drama officials or managers from the sect office, but in the world, Jia Qiang was afraid that only Jia Qiang would teach them in such a rebellious way and use them.

But no matter how much you respect them, you can't let them show up in public?

Jia Qiang raised his eyebrows and said, "There are more places that can take on great responsibilities! Nowadays, my business is getting bigger and bigger, and I need a public housing dedicated to checking accounts. However, people in public housing are most likely to be attracted and corrupted by people outside, and not many people can trust people. I taught them that after the public housing is established, they can be supervised. At that time, I don't know how many important accounts need to be looked at. If there is any problem, the person who makes a fool will lose his head. Isn't it considered a big responsibility?"

"Okay, okay, it's all gone. I heard it all morning and felt dizzy."

Daiyu didn't want to see Jia Qiang who had won the fight and was too proud, so she waved her hand to part.

Jia Qiang also put down the charcoal pen and invited him, "Go to the garden to have some breath?"

Daiyu glanced at him and said, "Didn't you still teach the teachers and officials of the military officers?"

Jia Qiang smiled and said, "They can't do it. They are not as smart as you. They have a lot of effort to attend four classes in a month. Tieniu is thinking about discussing with his sister to move back to Qingta to live."

Baochai, who was standing beside her, laughed and saw Jia Qiang, Daiyu looked over and said with a smile: "That brother-in-law, Tien Niu, one hand is bigger than a pen, and it seems like she is holding a small stick in her hand. I heard from my sister that writing a name is a bit difficult, how can I calculate these?"

Daiyu looked at Baochai with a smile, and then heard Jia Qiang ask, "Have you settled the matter between Brother Xue and the Xia family?"

A trace of sorrow appeared on Baochai's pretty face as white as ice and snow, and she said, "That girl in the Xia family...my mother asked someone to ask around secretly, it's amazing."

Daiyu teased and said, "How great is she? How can she be better than Sister Bao?"

Baochai said angrily: "I'm almost worried, you're still here to make fun of me!"

Daiyu was kind-hearted and saw that she was really sad, so she advised: "Your sorrow is unreasonable. You don't know what kind of person your brother has? They are not good people. How can you be the sister-in-law worry?"

Jia Qiang laughed loudly when she heard this. Baochai also pinched Daiyu's cheeks with laughter and tears, and said angrily: "I saw you love Xiangyun so much yesterday. I thought I really grew up differently. Unexpectedly, I was still as cramped as before."

Daiyu glanced at her and was about to speak when she heard Tanchun shouting loudly: "What are you here to do?"

Jia Qiang was surprised when she heard this, turned around and hurriedly advised: "Forget it, the third aunt, although Baoyu is not a good weapon, there is no need to chase him."

Baoyu: "..."

Tanchun said in anger and funny way: "Where am I talking about the second brother? I'm talking about the one who doesn't come in properly and is disrespectful!"

At the gate of the courtyard, a little brain appeared and disappeared, disappeared and then disappeared...

Everyone: "..."

Tanchun's face turned red and unstable. As Daiyu and others smiled secretly, he shouted: "If you don't come in, speak well, I won't forgive you today!"

Baochai smiled and sighed: "I forced a daughter of a public servant and a lady from a noble family to become a female Rakshasa..."

Tanchun smiled angrily when she heard this, "Sister Bao is now starting to sarcastic when speaking, and I don't know which one I learned from!"

Baochai's pretty face turned red when she heard this, and Daiyu looked over with a smile, making her feel more and more uncomfortable.

Fortunately, Jia Huan came in with a slight eyebrow at this time, with his shoulders high and his shoulders low, as if he was even limping his feet, and he was covered in a straight area.

He was obedient and did not go to Tanchun, but walked to Jia Qiang, sucked his nose, and grinned, "Brother Qiang, my mother said she wanted to invite you a host, just treat you!"

Before Jia Qiang could speak, Tanchun blushed and stepped over and spat, "Is it a fool? How could I treat you randomly? Go back and tell my aunt that she has so many jokes!"

Jia Huan was afraid of his sister, so he lowered his head and said, "It's not what I said, it's what my mother said... I guessed that you would say this, so let me tell you, Brother Zhu's daughter-in-law... It's what my mother said, it's not me. Brother Zhu's daughter-in-law can invite her, but I can't invite her? Brother Zhu's daughter-in-law invites her for Lan'er, and I can't invite her for Huan'er. Could it be that I'm shameful?"

"puff!"

"Ah hahahaha!"

"Gee!"

It should have been a concern for Tanchun's face, but Jia Huan twisted his waist, raised his eyebrows and stared at him and imitated his mother's sexy appearance. It was so vivid!

Seeing that everyone laughed and burst into tears, Tanchun was really trembling in his breath.

Then she saw her clench her fists and slam her towards Jia Huan who was still imitating Aunt Zhao.

Jia Qiang smiled, stepped forward and held her arm, stopped her, and said, "It's not that I'm still a child. You're serious, you're boring."

Tanchun's face turned blue and her lips were trembling and could not speak.

Daiyu winked at Jia Qiang and asked him to go.

Even if I look down on Aunt Zhao or Jia Huan, Tanchun still has to give her face.

Tanchun said it badly and looked so angry that he hated it to the core, but only when he loved it deeply could he hated it!

She can scold her, but if others scold her and look down on her, it will hurt her heart.

Jia Qiang thought for a while, and there was nothing serious about it at noon. He looked at Jia Huan and said, "Can't your mother really invite me alone?"

Jia Huan sniffed, raised his eyebrows, and looked like he was lying on the goods, saying, "Master, you should come too."

"You won't say it soon!"

Tanchun yelled at him.

Is that the same thing as Jia Zheng is there?

Jia Huan muttered with fear, "You didn't ask me..."

Jia Qiang stopped Tanchun who was about to rush to Jia Huan, and put an arm in front of her, making her unable to rush.

After Tanchun ran into each other for three or four consecutive times, he didn't know whether he was angry or what, but his face turned red and his ears turned red. He still let go and stopped killing his brother.

Jia Qiang pulled the corner of his mouth and said to Jia Huan: "Let's go, go to the Western Palace to have a look. If you are here, I will sit down and eat a few bites. If you are not here, just ask your mother what she means, and the food will be spared."

Jia Huan didn't care about Yazi, but Baoyu was a little anxious. He didn't even care about his sisters and Jia Huan who was beside him. He grabbed Jia Qiang's sleeves and said anxiously: "Brother Qiang, when you see the master, you must speak for me!"

Jia Qiang looked at Baoyu for no reason and asked, "Sorry, who are you? Do I know you?"

"Puff!"

Tanchun, who was so angry that he was so angry that he saw Jia Qiang's questioning with a strange and polite look on his face, couldn't help it and burst into laughter.

The other sisters were also amused, and Xiangyun laughed so hard that she fell to the ground with a "gudong"...

Du Baoyu was furious and stomped his feet and said, "It's not the time to laugh!"

Yingchun smiled and said, "Don't be angry with him anymore, his face is purple."

When everyone saw his tears flashing, they felt bored. Jia Qiang yelled: "If the second master asked me, I would just say that. I agree or not, and I am not sure. The main reason is that I asked you to write a book, and you don't write it well. It's been more than half a year, but I have only written less than 30,000 words. Do you know how much a book writer I know has written in more than half a year?"

"How many?"

"Two million words!!"

Daiyu hurriedly smiled and said, "But that official outside the room? I also like him very much. I work hard and have a good story. It's clean and unconventional."

Tanchun smiled and said, "It's a coincidence, so do I!"

Baochai nodded gently and sighed: "It's very good, it's very funny."

Baoyu hurriedly said, "Start today, I will definitely write well!"
To be continued...