祖冲之是我国古代著名的大数学家，是圆周率的发现者。然而，他在小时候，并不是很聪明，学过的内容背不下来，成绩平平常常。祖冲之的爷爷祖昌是位大匠卿，专门负责管理建筑工程事务。为了开发祖冲之的智力，开阔他的眼界，祖昌亲自带着祖冲之出去开眼界，见识世面。在建筑工 Zukong is a famous ancient mathematician in our country and a discoverer of pi. However, when he was young, he was not very clever, what he had learned did not come back, and his grades were mediocre. Zu Chong’s grandfather Zu Chang is a great craftsman, specializing in the management of construction projects. In order to develop intellectual Zuchong, broaden his horizons, Zu Chang Zu Chong went out personally with an eye-opener, to see the world. In the construction workers