"Tear down the other side too"
After getting Li Er's permission, Qin Mo began to instruct the craftsmen to continue the demolition.
Seeing the house being demolished, Li Er's face twitched. This Shandong kid was too arrogant. Even if they wanted to demolish it, they had to wait until he left.
However, Qin Mo's cement could be said to be a powerful weapon for national defense. Imagine building a fort on the grassland. The grassland barbarians would no longer have a chance to turn things around, and the Central Plains Dynasty would no longer have any foreign enemies.
Ever since the Northern and Southern Dynasties, the foreign tribes had always been a great threat to the Central Plains. Even the Li family had to bow their heads to the Turks.
The invasion in the ninth year of Wude had been Li Er's greatest humiliation.
The cement could expand the Great Tang's reach to the grasslands.
What could a mere Prince Qin's Residence do?
I'll endure it.
Thinking of this, Li Er felt much better.
Li Er naturally couldn't watch Qin Mo demolish the building, so everyone went to Hongwen Hall.
Director's office now.
Qin Mo ordered the carpenters to build chairs and tables. The furnishings were very modern.
Qin Mo ordered his men to fetch water and make tea.
The tea set was made of porcelain and was no different from the tea set of the later generations.
Li Er picked up a cup of tea and drank it before saying,"Zhong Da said that you invented some Tianzhu numbers again. It's easy to calculate and I'm promoting it. What's going on?”
Qin Mo said,"Your Majesty, I didn't invent these Indian numbers. Haike got them from India and passed them on to me. I think it's easy to calculate, so I hope it can be implemented in the world."”
Li Er didn't deny it."Is Tang's mathematics bad?”
"The Great Tang's numbers are difficult to learn and inconvenient.”Qin Mo explained.
The fact that Arabic numbers could become a global number in the future had its own advantages.
"I think that the Great Tang's mathematics is good enough and that there's no need to promote foreign numbers.”Li Er said unhurriedly.
Qin Mo broke out in a cold sweat. He knew Li Er's character even with his toes. He reckoned that this guy was deliberately causing trouble for Qin Mo because he wanted to demolish his house.
The cunning old man looked like he was watching a show. Foolish Yuchi knew nothing about mathematics and was completely uninterested.
The old hole in the Great Tang Dynasty, the number is also counted as the number of mathematical talents, the number is counted as the number of mathematical talents, the number is counted as ”
"I'll think about it again." Li Er looked indifferent.
He looked at Qin Mo as if he was begging him.
It was not his fault. Ever since Qin Mo arrived in Chang 'an, he had been suffering.
Qin Mo smiled."Your Majesty, do you know mathematics?"”
Li Er humphed."I've been familiar with the Nine Jiuge since I was young.”
The multiplication formula (also known as the Nine Jiuge) had been created a long time ago. As far back as the Spring and Autumn Warring States Period, the Nine Jiuge Song had already been widely used by people.
In many works at that time, part of the multiplication formula had been quoted. The original Nine Jiuge had 36 chants, starting from '9981' to '224'.
The excavated bamboo slips of the Han Dynasty and the ancient broken wooden slips of the Nine-Nine Technique found in Dunhuang all began with the number "Nine-Nine Eighty-One". The name "Nine Nine" was the first two words of the chant. Around the 5th to 10th century, the "Nine-Nine" formula was expanded to "One by One".
It was only during the Song Dynasty (11th and 12th century AD) that the order of the Nine Jiuge became the same as that used in modern times, from "one by one" to "nine by nine by eighty-one".
Qin Mo said,"Then I'll ask Your Majesty a question. There are eight people, and each of them has nine wen. How much money is there in total?”
At this time, there was no such thing as a multiplication in the Tang Empire, so Qin Mo could only change it to a mathematical application problem.
What was eight times nine? This question stumped the Ying Country's Prime Minister in the future because the Ying Country did not have a multiplication table.
"Brat, is such a simple question hard to come by?”Li Er sneered,"It's a total of 72 wen.”
Qin Mo nodded."Your Majesty's mathematics is not bad. I'll ask again. There are twelve people, and each of them has thirteen wen. How much is the total?”
This time, Li Er began to ponder. Nine Jiuge only had a single-digit multiplication, but a ten-digit multiplication stumped him.
"Uncle Zhangsun can be?”Qin Mo looked at the sly old man.
The cunning old man glared at him."How could I calculate it so quickly without counting?"”
He looked at Foolish Yuchi. Forget it, I won't ask him anymore. This guy's IQ probably doesn't even know how to calculate single digits.
Kong Yingda counted with her fingers for a while."There's a total of 156 wen, right?”
Qin Mo nodded.
"If the number of people is 123, each person has 456 coins. How much money do you have in total?"”
Even Old Kong was stumped.
Li Er said in a very bad tone,"Brat, how can we solve such a difficult problem?"”
Qin Mo took out a piece of paper and walked to the table in front of Li Er. He used a pencil to write down the multiplication formula. It only took him a dozen seconds to calculate the result."There are 56,088 in total."”
Li Er was shocked by Qin Mo's speed and said embarrassedly,"These Indian numbers are so convenient!”
"Your Majesty, these Arabic numbers can be used in construction, agriculture, military, and other aspects. It can save a lot of manpower and material resources.”
"I wonder if we should promote the world?”Qin Mo smiled.
"Yes!" At this time, Li Er no longer wanted to deliberately make things difficult for Qin Mo. The convenience of this number had already conquered him.
However, he was very depressed.
"Thank you, Your Majesty."
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