In ancient Greece, it was about 158.5 thousand meters, so the radius of the earth he measured was about 6,340 kilometers, and later generations have calculated the radius of the earth many times, and the difference between the radius of the earth and the radius of the earth measured by him is only a few tens of kilometers.

Because the scientists of ancient Greece have calculated the circumference and diameter of the earth, they have carried out ingenious geometric calculations on this basis, and finally calculated the distance from the moon to the earth, although there is a certain gap with the distance measured by radar lasers in the 21st century, but the conclusions they have reached are very close to the truth.

After listening to my story, Sister Yaoguang couldn't help but exclaim: "They are so powerful, they are really amazing, they can calculate such a long distance just by relying on things on the ground and careful observation." ”

"Yes, the wisdom of the ancients cannot be lightly taught, and more importantly, we, and even our future, must work hard, at least not even the ancients." I replied with a soft sigh.

Before the Qing Dynasty, the invention and creation of science and technology in the world of the Chinese nation was obvious, but in the invasion of foreign races, the open mind and active thinking in the blood of the nation were gradually annihilated and strangled.

Fortunately, I came, I have traveled through a long history, and I have come to this era, and I will stand up and make natural science, astronomy, geography, chemistry, physics, mathematics and other disciplines become professional study subjects, so that those Chinese capable people and wise men will not just put their minds on Confucianism, and they will be chattering crookedly all day long for thousands of years.

As an excellent student, you must be proficient in mathematics, physics and chemistry, and also know astronomy, geography, before you can become a teacher, so that the Chinese nation will firmly grasp the key to science, and in the future, even if it is to become the master of the solar system and even the entire galaxy, it is not impossible.

"Husband, you even know all this?" Yaoguang's eyes were shining, like the brightest stars in the Milky Way. A look of admiration and joy, yes, she is feeling sincerely proud and proud that she has such a knowledgeable and talented husband, who is proficient in all kinds of scientific inventions.

"Yes, good wife, do you know the Dao, not only do you know the Dao, but also in the eastern capitals of Luoyang and Chang'an, you have spent a lot of money and collected a large number of works by Western barbarians, but there are many of them, which are exactly what today's China needs." Ben Gongzi kissed Yaoguang's sister's white and smooth face fiercely, and smiled proudly. "There are not only academic and literary works of ancient Greece, but also many good things from ancient Rome and ancient Persia......"

The Yaoguang girl was caught off guard by a sneak attack, and couldn't help but snort lightly, and wiped the place I had kissed with her hand. "Scoundrel, don't mess around."

Ben Gongzi laughed lewdly twice, ready to continue to break the bad moment, but he felt that the carriage was beaten, and it gradually slowed down, and there were greetings and talking voices outside the car, damn, the Tang Guogong Mansion has arrived.

When I opened the door of the carriage, I saw Li Shimin and my sister standing on the steps at the entrance of the house, looking at us in surprise.

I jumped out of the four-wheeled carriage, and then was about to welcome the Yaoguang girl down with a gentleman, this girl had already jumped out of the carriage by herself, and greeted Li Shimin and my sister, alas, so that this son could only pretend to pat the car door with his outstretched hand, as if he was testing the thickness and hardness of the car door.

"This kind of carriage, could it be that you made it too, brother?" The girl who was already a new wife still did not change her gossip nature, and walked forward with curiosity in her eyes, looking at the strangely shaped four-wheeled carriage, but Li Shimin was no better, and after saying hello to me, she walked around the four-wheeled carriage.

"Hey, it's really good, I said brother, I'm afraid this thing is expensive, right?" After going around the four-wheeled carriage, Li Shimin simply got into the carriage and tried it, his eyes brightening more and more.

"The price is not too expensive, the total cost of my specially customized four-wheeled carriage is only about 1,100 yuan, even if it is sold, it is 2,000 yuan." I smiled and replied.

"Really? Brother, why don't you sell me one at cost price? Li Shimin seems to like this special shape and comfortable four-wheeled carriage.

I pursed my lips and said disapprehantly, "Are you sure you want to buy it?" ”

"As long as you are willing to sell at cost price, how can the younger brother be able to dismiss your good intentions?" Li Shimin jumped out of the carriage with an obscene smile on his face, patted the car body with great satisfaction, and said.

"It's not impossible, but you can see it, if this car wants to be light and fast, then you have to have four horses, and you can't have horses, you have to have roads, and there are cement straights like Chang'an and Guanzhong." Ben Gongzi replied with an equally obscene smile.

Li Shimin couldn't help grinning, looked at me, then at the carriage, and then at the unsullied people who were getting together with Yaoguang and didn't know what to say, looking at the carriage non-stop. Gritted his teeth and stomped his feet. "Buy, what are you afraid of, although the younger brother is less in Chang'an, but my wife and my mother are here, I can't sit, the two of them can ride."

"Okay, just say this to you, and I'll eliminate the odds for you." Ben Gongzi patted this guy on the shoulder very generously and smiled. The actual cost is about 400 yuan, but this son is a businessman, so it is naturally impossible to turn over his hole cards to show this product.

"Brother, if the little sister wants it, are you embarrassed to accept the money?" Just when Li Shimin was about to nod in agreement, my sister, an uninteresting girl, spoke, and blocked me on the spot with one sentence.

"I'm your sister, do you really want to take money from your own sister? Hmph, if this is the case, when I go home, I will definitely let my mother know about it. My sister had a very aggrieved expression, but her eyes were really treacherous.

I could only smile helplessly and give a thumbs up to this girl: "Little girl, you are ruthless, my brother has lost to you." ”

My sister smiled happily and waved at me: "That's really thank you brother, Sister Yaoguang, don't blame your little sister for being greedy for money." ”

"What's the matter, who doesn't know that your brother is the number one tyrant in our Guanzhong, even if you blackmail." Sister Yaoguang saw the helpless but laughing expression of her son, and almost bent over with laughter.

"There's no way, who made you my sister, as long as you want it, just open your mouth, to others, for brother or to weigh it, to your own sister, absolutely nothing." I shook my head, looked at the smiling girl, raised my hand and rubbed her head.

"Brother, don't rub my head, I'm a big girl." The younger sister stroked her hair shyly and sneered.

"That ......" Li Shimin looked at his mother-in-law's sister-in-law with a smile, his eyes were full of tenderness and sweetness, but he opened his mouth when he turned his face to look at Yaoguang, well, his expression was very strange and hesitant.

"I said, Shimin, what are you doing here?" Ben Gongzi approached with curiosity and asked.

"Little brother has a headache, what should I call my sister? It stands to reason that she is my sister-in-law, and you should be my sister-in-law, but now, the younger brother has married your sister-in-law and become your sister-in-law......" Li Shimin said with his fingers very sad.

Khan, such a tangled problem came out again, I remember that the Yaoguang girl was also entangled at that time, but all this is really trivial for this son.

"Isn't that easy? What was called in the past, and what is still called now, you can't call yourself dizzy. My son waved his hand and said, my sister-in-law Li Shimin, brother and sister, thought about it and felt that this was the best solution for now.

My sister blinked: "Well, after that day, when I have a child, ...... called"

I smiled and patted my sister's shoulder and said, "I said sister, you are a typical salty radish and don't worry about it, what do they want to call it, that's their business, let's take care of ourselves." He can't solve it by them, and they have a headache on their own. ”

Sister Yaoguang also nodded thoughtfully, and walked forward with my sister in her arms. "Listen to your brother, hurry up and get in......"

Li Shimin gave me a thumbs up speechlessly, and it seemed that he also felt sincere admiration for the IQ of his son.

Entering the mansion, from a distance, you can see a figure waiting outside the front hall, looking this way, who else can there be besides Queen Dou?

The footsteps of the Yaoguang girl first paused, then she let go of the hand holding the innocent, and rushed straight over, and the milk swallow plunged into Queen Dou's arms like a forest.

Then, there was a burst of crying, so frightened that Lao Tzu stood at the foot of the steps of the front hall and didn't dare to go up, because Queen Dou hugged her daughter tightly and kept asking if someone was bullying her, while asking, she stared at me fiercely with her sharp eyes that shot like razors.

"Hey, I said brother, you won't really bully my sister, right?" Li Shimin was also taken aback, and couldn't help but gently tug my hand and asked in a low voice.

"Your sister! How could such a humble and kind gentleman as a brother bully your sister? Ben Gongzi glared at this thing with grievances. With your sister's strength, do you think I can bully her? Throw me and your sister into a heads-up, if your sister loses, it will be a wonder in the world......"

Even if it's bullying, it's that kind of bullying, but even Zhou Gong allows it, and even Kong Lao Er has said that he eats sex, can this kind of bullying be wrong? If there is really a mistake, it is no wonder that the Chinese nation that has abided by etiquette is going to be exterminated.

Li Shimin almost fell on the steps when he heard this, and pointed at me with a smile, well, he must be speechless to distinguish between the righteousness of this son and Tao Tao.

Hearing her brother ask such a question, Yaoguang Mei, who was crying so heartily, finally came back to her senses, raised her pretty face like a pear blossom with rain, and saw Queen Dou looking at me, an innocent-looking husband, with a dark face, and couldn't help but look back at me with some embarrassment, and then whispered to her mother: "My daughter cries when she misses you, Brother Wuji, oh, it's too late for my husband to hurt me, how dare you bully me?" ”