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古代埃及人一直认为:圆是神赐给人的神圣礼物,因为圆是非常完美的图形．圆周率是圆周长与直径的比值,正由于圆的特殊,所以圆周率也变得非常特殊．众所周知,圆周率是一个常数,通常用希腊字母π表示．关于圆周率的计算问题,历来是中外数学家极感兴趣、孜孜以求的问题．从公元前2000年,古埃及人便算出了圆周率的第一位,公元前1200年,中国人也算出了圆周率的第一位．到公元前2世纪,中国的《周髀算经》里已有“周三径一”的记载．在以后相当长的一段时间内,古巴比伦、古印度、古中国实际上都长期使用π=3这个数值．只有到了东汉时期才有一位数学家算出圆周率为3．16．
The ancient Egyptians always believed that: The circle is a divine gift given by God because the circle is a very perfect figure. The ratio of circumference to diameter is the ratio of circumference to diameter. Because of the special circle, the circumference becomes very special. As we all know, the pi is a constant, usually represented by the Greek letter π. The calculation of pi has always been an issue of great interest and ambition among Chinese and foreign mathematicians. From 2000 BC, the ancient Egyptians calculated the first pi, and in 1200 BC, the Chinese also calculated the first pi. By the second century BC, there was a record of “Wednesday Trail One” in China’s Zhouyi Sutra. For quite a long period of time later, Cuban, ancient India, and ancient China actually used π=3 for a long time. Only in the Eastern Han Dynasty did one of the scholars calculate that the PI was 3.16.