"Get a watch, one table per person, and an abacus, and take it to match the land area of the imperial court."

In the Li family's Zhuangzi, Li Yi distributed things to 220 students.

Long tape measure, short tape measure, abacus, table book, pen, one to one hundred square tables.

"Remember the area formula of the circle and the three-oblique conjunction, don't use the area of the circle with a diameter of three spheres, didn't our ancestor Chongzhi give out three points one hundred and four five nine two six, according to three points one four."

Li Yi went on to say that the formula for calculating the area of a circle is to multiply the square of the diameter by three and divide it by four.

If the diameter is eight and the square is sixty-four, multiply three to get 192, and divide by four to get forty-eight.

According to the formula of the area of the circle, the radius is four, the square is sixteen, multiplied by the pi three points and four, and the number obtained is fifty points twenty-four......

When you get to the land, you will encounter a triangular land, which is still irregular, so first measure the amount of the large piece that can be used in steps, and estimate the remaining point.

What Li Yi gave was the trioblique quadrature method, which knew the length of the three sides of the triangle to calculate the area of the triangle.

When measuring, you don't need to step, use a tape measure, say how many feet a good step is, and convert it on both sides.

Two hundred and twenty officials had work to do, twenty were in charge of the land around Chang'ancheng, and the others were ten people in each county.

They were responsible for teaching and statistics, supervising by the way, and a whole bunch of tape measures, pulled by carts.

They are serious officials, and whoever dares to cheat can be impeached in a small notebook.

The officials set out with the heavy task of surveying the land.

Jingzhao Mansion was in chaos, and the imperial court ordered to re-clear the acres of fields, and news came out that the rent would be calculated according to the acres in the future.

The people who have annexed the land by various means are dumbfounded, how can it be? Can't wow!

The rent is calculated according to the mu, and the family has to pay a lot more rent every year.

The people who actually gave less land and the people who sold Yongye land were happy, and they were able to pay less rent if they recalculated.

The mediocrity and harmony tune have been canceled again, and the family can be regarded as having a better life.

The people of the big family who were officials in the court wrote back and told the family about the situation in Jingzhao Mansion, and they would definitely adopt the same method in the whole Tang Dynasty in the future.

If you don't want to pay more rent every year, think about countermeasures.

The court was surprisingly calm, no one was impeached, and the Imperial Doctor and a servant were still imprisoned.

His Majesty wants to implement a new policy in Jingzhao Mansion, it is useless to oppose it, and he will implicate himself.

Many of the rich men wept and felt that the tried method was to cut their flesh.

"In this way, land annexation is no longer worry-free, and those who have no land do not pay any rent, but only look for a profitable job."

At noon on heaven and earth, Yao Chong and the others had dinner again, and Lu Huaishen had a smile on his face.

Zhang said that he used a pen and a ruler to calculate there: "Hook three strands, four strings and five, two right triangles together, a rectangle."

One side is three, one side is four, and the area is twelve. Divided into two triangles, one is six.

Then calculate according to the formula.

The circumference is three plus four plus five, twelve, divided by two, six, six minus three, multiplied by six minus five, multiplied by six minus four, is six, multiplied by that six, thirty-six.

Thirty-six square, six six thirty-six, equal to six, that's right. ”

He chose the dumb method to verify the correctness of the formula and found the data pairs.

"In this way, it will be convenient to calculate the area of the triangle in the future, and the area of the circle, Zu Chongzhi, three and three points one four, is a lot different."

Wei Zhigu is looking at the formula of the circle area, which is different from the method of measuring one and circumferring three that has been used now, and it is more accurate.

Bi Gou was worried: "The old man is worried that the local government knows that the rent of Jingzhao Mansion will be chaotic, and the big family will not be able to make trouble." ”

"Incident? What's going on? Disinformation? The speed at which they get the news is as fast as the speed at which the imperial court sends the horses to the state capitals? ”

Song Jing is not afraid, there are soldiers in the court, and the court documents are passed out through the post station.

Tell the yamen in various places to post the matter of Jingzhao Mansion clearing the acres of land and collecting rent according to the number of acres.

When the landless people found out, they would look forward to the imperial court quickly releasing the decree to the local area.

No matter how powerful the local area is, it can't incite the people, and with their own manpower, the soldiers of the court are nothing more than decorations.

As soon as he thought of the current surrounding situation, he shook his head: "Could it be that Li Yi took advantage of the Turkic civil strife, the difficulty of the Khitan to cling, and the defeat of Tubo, so that he came up with the method?" ”

He suspected, it was too much of a coincidence, why didn't he mention it earlier?

"Next year, the rent of Jingzhao Mansion will be overcharged by my household department, and there will be less money for transfer, but more money for business."

Bi Gou returned to his happy appearance, and he looked forward to the Datang as soon as possible.

This year, Jingzhao Mansion will be able to clear land in most places in Datang next year, and by the way, the work of taxation will be promoted.

Yao Chong looked at the people walking in the sunlight outside the window: "One tax, one rent per mu, are all aimed at rich households and wealthy businessmen. ”

"The dictionary will come out next month, and the staff of the newspaper will be trained by the end of the year, and it is aimed at other families."

Zhang said to look at Lu Huaishen, Lu Huaishen is a member of a big family.

Lu Huaishen looked out of the window together: "What kind of family is the old man, it's just a side branch." ”

"If everything is promoted, the prosperity of Datang will really come. In the past two years, Chang'an has changed too much. ”

Yao Chong, who was still looking at the people below, showed a look of expectation in his eyes.

He looked at it for a long time, but did not see a single pedestrian in tattered clothes.

It shows that everyone has money, at least the money to buy clothes.

I was able to buy clothes, and of course I had no problem eating.

"Song De." Lu Huaishen saw an acquaintance.

Song De drove the car, put a lot of watermelons on the car, and walked over under the protection of a group of Yulin flying horses.

"He went to the East and West markets to sell watermelons?" Bi Gou poked his head down.

"The watermelon of the Li family Zhuangzi is not enough to eat by himself, how can he sell it, he is sending it to Beitianfang.

Li Zhuangzi delivers things to Beitianfang every day, which is usually leftovers from Zhangjia Village.

It's been hot lately, it's not raining, so I'm sweating while sitting, let's eat. ”

Zhang Shuo glanced at it and ignored it.

Before they could finish eating, Song De reappeared, and the watermelons in the car disappeared and were replaced by a mess.

"He had old clothes in his car? And the leather clothes, where did you get them? Take watermelon in exchange? Lu Huaishen wondered again.

"I've gone to the pawn place, the dead pawn and the clothes that have not been redeemed, what does Li Yi want to do with the old clothes?" Yao Chong raised his eyebrows.

When someone else goes to the pawn place to buy something, he doesn't pay much attention.

Li Yi bought several cars at once, how could he not want to think about it.

"I'll go to the Li family Zhuangzi in the evening." Bi Gou looked at Yao Chong proudly, Yao Chong couldn't go now.

"I'll go too." Song Jing decided to make a companion with Bi Gou.

"By the way, ask him, if there are any other big moves, don't throw them out all of a sudden, and I don't know who the prime minister is."

Zhang Shuo, who also couldn't go to the Li family, asked for it.

Everyone nodded, yes, ask, Li Yi has been honest for a while, and now he won't be crazy.

After eating, everyone went out, and there was no coolness in heaven and earth, and the heat wave hit their faces.

"The merchants who stocked ice last year made a lot of money this year, and if there is any good way to beat the heat, go to Lijia Zhuangzi at night and ask."

Bi Gou is old and can't stand this kind of weather anymore.

Brothers and sisters who read books at the outstation, have the ability to subscribe to the starting point, and especially need monthly passes and recommended tickets, see if you have them in your hands, and the farmer bowed.