Gan Lun then took out the topic and read: "In the second year of Hongxuan, Wu County was merged with Guanlin, and the government officials were reorganized. In the first year of transfer, they received the original salary, and in the following year they received two-thirds salary. The first year after entering Guanlin, the status quo remained

"The following year's salary will be 20%; the original salary will be increased by half again. Question: In a certain year, the hourly salary will be 16%. How much will the salary be in the four years after entering Guanlin?"

After he read the question, everyone was surprised and exclaimed: "Oh, it's this question. Oh, it's amazing. You can do this question. Lord Gan, your students are amazing."

Because this topic is a difficult problem accumulated by the Ministry of Household Affairs, everyone is familiar with it.

At that time, the Jin Dynasty was newly established. After the war, the people were depleted and the national treasury was also very empty.

In order to reduce expenses, the court decided to merge two or three counties together to form a new large county. In this way, the number of official positions in the yamen would be reduced and they would be divided according to performance.

Because the court could not pay out salaries, the salaries of officials who were willing to be diverted were reduced in the first two years; when the economy of the Jin Dynasty recovered and the national treasury was full, they would be increased year by year to make up for the initial salary arrears.

In order to know to what extent the official salary needs to be increased in order to make up for the loss of the original salary, how much money the court will need to pay the official salary, and whether the national treasury revenue can afford it, the emperor at that time asked officials from the Ministry of Household Affairs

Calculate this data. If you can't afford it, you have to adjust the increase and extend the time to make up for it.

It would be easy to calculate only the salary of a certain official. You can calculate it by adding, subtracting and subtracting.

But this is not an official, but local officials across the country, and the salary level of each official is different. This requires an algorithm.

At that time, the officials of the Ministry of Household Affairs did not know how to calculate the formula. In the end, they had to resort to a desperate method and forcefully calculate it for each province, county, and official. It took all the officials of the Ministry of Household to die for half their lives.

Calculate this data and give it to the emperor.

After that, this topic became a difficult problem that the Ministry of Revenue could not solve. Every new official from the Ministry of Revenue, who claimed to be a good student, had to give it a try, but he always hit the wall.

"Oh, I think when I first joined the Ministry of Household Affairs, I almost got a fatal disease just to understand this problem. In the end, my old lady scolded me and asked me to live with calculations, so I put it aside

Throw it behind you," said an official.

After hearing this, everyone laughed "haha".

Everyone basically has the same experience.

"Everyone, stop talking nonsense. Now that Mr. Gan has explained it, hurry up, Mr. Gan, please tell us how you solved it." Someone urged.

Gan Lun learned what he was learning and put it into practice, and paraphrased what Zhao Ruxi said: "This is a problem of downsizing and increasing efficiency, and it is a problem of 'general terms of a sequence' and 'optimal function model'."

Everyone: "..." I understand every word. What does it mean when put together? I don't understand!

"Master Gan, can you speak human language? I don't understand you," someone shouted.

"You don't understand, do you?" Gan Lun asked with a smile while stroking his beard.

Everyone nodded.

Gan Lun glanced sideways at Guo Jitong: "Master Guo is very good at arithmetic. I think he understands it. How about Master Guo tell everyone?"

Guo Jitong's face was not very good, and he smiled and raised his hands: "Guo is ashamed and dare not use the word 'awesome'. Guo also doesn't understand, so I asked Mr. Gan to give me some advice."

Qi Xugu quickly smoothed things over: "Master Gan, please stop being so pretentious and tell us quickly."

Gan Lun was also aware of Qi Xugu's dilemma, so he did not target Gan Lun again. He looked away and explained the problem-solving ideas that Zhao Ruxi told him.

When Zhao Ruxi first told Gan Lun, he tried to use Jin's arithmetic to explain things that could be explained. If he couldn't explain it, he directly told Gan Lun which theories in Queen Shengyao's arithmetic book were used.

Gan Lun's memory was not bad, but he explained Zhao Ruxi's solution in detail.

The Household Department is no different from other yamen in that it requires people to roll up their sleeves and do practical work. The vast majority of people are proficient in arithmetic, and there are very few people who come in based on family background or flattery.

From what they understood, everyone could feel that Gan Lun's idea was correct, but when it came to the theory in Queen Shengyao's arithmetic book, everyone was left scratching their heads.

Everyone was about to grab Gan Lun and question him carefully, but Qi Xugu grabbed Gan Lun's arm and said, "Brother Qi, come, follow me into the house. I have something to tell you."

He waved to everyone again: "I know you still have many things you want to ask Mr. Gan. But it's late today. Don't some of you still have to attend the auction held by His Highness the Fifth Prince? Go back quickly to pack up and prepare.

It’s time to go to the office. Mr. Gan doesn’t know how to run away, so I’ll have plenty of time to ask him for advice.”

With that said, he pulled Gan Lun into the back room.

The officials outside had no choice but to disperse.

Gan Lun was pulled into the house by Qi Xugu, but he was still unhappy.

Although there are some of Zhao Ruxi's problem-solving theories that he cannot understand and cannot explain thoroughly to everyone, he is not here to lecture everyone, but to show off to the students. When the time comes, he will directly say, "This is what the students told me.

"I don't understand either" is fine, there is no need to be irresponsible at all.

And everyone is proficient in arithmetic, and can understand the whole thing at a glance. Even if you don't understand something, you can still feel whether the general idea is correct.

This is the effect he wants.

Although he couldn't tell the name of his student Zhao Ruxi, he could still pave the way for her and make her famous.

The cone is in the capsule and stands out.

He believed that Zhao Ruxi's talent in mathematics could not be hidden.

When her reputation in painting has further improved and she has become a master of painting and a celebrity, this talent does not need to be hidden. The things he did for her today are not completely useless.

So Gan Lun interrupted him to show off his students, but he was unwilling to do so in every possible way.

Qi Xugu asked, regardless of whether he wanted it or not, "Can you really understand Queen Shengyao's arithmetic book?"

"I can't understand." Gan Lun shook his head sharply.

Qi Xugu: "..."

He glared at Gan Lun: "Then how do you apply the theory you just solved?"

"That was solved by my students."

"Which student of yours? Tell me. If you don't tell me, I will assume that you understand it yourself and don't want to tell everyone. I will go to the next court tomorrow to report to the emperor that you understand Queen Shengyao's arithmetic.

But I cherish the book and am unwilling to teach it to everyone. When the emperor issues an imperial edict, it will be too late for you to say you don’t understand." Qi Xugu threatened.

This time it was Gan Lun's turn to glare: "You, you, you...how dare you act like this?"

"Huh, didn't you force me to do that?"

Qi Xugu was worthy of being a minister of household affairs. After saying this, his face dropped and he began to play the sad card.
Chapter completed!