Wake up.

The heavy rain outside is still falling.

It's just that the wind doesn't seem to be that strong anymore.

Zhao Ce opened the door, and a slightly cool wind came in.

Su Cai'er was behind him, poking her little head.

I also looked outside.

The sky is still gloomy.

There is no light at all.

With her eyesight, she couldn't see anything.

"Husband, how's it going in the main room?"

Zhao Ce thought of the scene he saw last night and said helplessly: "More than half of the roof was blown away last night."

"But it's too dark today and I can't see clearly."

"Let's wait until it gets brighter."

The two of them walked along the eaves to the kitchen.

Walked along the way.

Zhao Ce saw that part of the wall on the other side of the patio had collapsed.

Fortunately, Zhao Youcai brought his people to reinforce the roof of their room and kitchen yesterday.

Otherwise, the two of them might not even have a place to squat today.

After entering the kitchen.

After lighting the oil lamp and raising the fire.

The kitchen just became bright.

Su Cai'er looked at the sky outside and said, "It feels like it's going to rain for a long time."

"But fortunately we have plenty of food at home."

Previously, the two of them went to the city to buy a lot of things needed for daily life.

Last time Uncle Six's house brought them a big bag of millet.

It is estimated that I can eat these grains for two to three months.

Although the roof of the main hall is broken.

However, there is still a tile to cover the head.

After washing.

The two had breakfast.

The sky finally got a little brighter.

I could just barely see the collapsed low wall on the other side of the patio.

Zhao Ce fiddled with the broken umbrella and opened it.

Then he put the straw hat on the little girl.

Then he took her to the front with him.

The two of them were wearing slippers and their trousers were rolled up high.

Standing in the rain.

Zhao Ce looked at the dark sky, and the rain kept falling from that half of the roof.

Couldn't help but let out a sigh.

The water inside the house cannot flow out because of the threshold.

They all poured toward the patio.

A gust of wind blew by.

The bamboo strips and thatch on the roof over there still fall off a little from time to time.

Su Cai'er pursed her lips and whispered: "Husband, the roof collapsed."

Zhao Ce pretended to be relaxed and said: "It's okay."

"Fortunately, there is nothing valuable in the main room."

"Let's go back to the room."

"We'll make plans after the rain stops."

Su Cai'er glanced at the roof again before following her husband back to the room.

The raw sugar has not been delivered yet.

Su Caier can also make clothes for the two of them in the house.

But Zhao Ce really had nothing to do at home.

Been busy for so long.

Suddenly I was free.

It's still a bit unaccustomed to it.

Zhao Ce thought for a while.

I went back to my room and dug out the four treasures of the study I had been using.

An inkstone and a brush that appear to be of average quality.

There is also a bit of rough paper.

Place all these things on the table in the room.

Zhao Ce began to sharpen his ink.

Su Cai'er was doing needlework while curiously watching her husband polish the ink.

"Husband wants to study, then I'll go to the kitchen."

Zhao Ce waved his hand.

"It's okay."

"Just sit there."

After the ink was polished, Zhao Ce dipped the brush into it and began to write four words on the paper.

"Basic Mathematics".

Yes, as a modern person.

Zhao Ce's only advantage is that he has a wider range of knowledge than the ancients.

After the establishment of the Ming Dynasty.

Due to various reasons such as the war in the late Yuan Dynasty.

Most of the mathematical works of the Tang and Song Dynasties have been lost.

And because of the eight-part essay imperial examination pioneered by Emperor Hongwu.

Mathematics never appeared in the imperial examinations again.

Tianyuan Technique.

It was basically lost during the Ming Dynasty.

But nevertheless.

After Hongwu Emperor Zhu Yuanzhang came to power, he vigorously promoted basic mathematics in the Ming Dynasty.

And with the completion of the calculation algorithm, abacus arithmetic also began to appear and became popular in the early Ming Dynasty.

After that, a number of works on abacus appeared in the Ming Dynasty.

In terms of Tianyuan Shu, it is basically the same as the method of formulating equations in modern algebra.

For modern Zhao Ce, he probably still remembers some of it.

But what he wanted to do was not something so high-end.

As a farmer, he wanted to compile a book.

It must be in line with your own identity, and it must be something that can bring you tangible benefits to your reputation.

In the Ming Dynasty, due to the writing of eight-legged essays, many people regarded things like arithmetic as miscellaneous studies.

But even so, there are still many mathematical masterpieces circulating in the world.
To be continued...