祖冲之(公元429—500年)是我国南北朝时代南朝的一位杰出科学家,在研究数学、天文历法方面有卓越的成就,在机械制造方面也有不少发明创造。比如,他计算出圆周率介于3.1415926与3.1415927之间,一直到十五世纪,这还是世界上最好的结果。他用355/113表示圆周率的密率,在西方, Zuchongzhi (429-500 AD) is an outstanding scientist in Southern Dynasties and Southern Dynasties. He has made outstanding achievements in the fields of mathematics and astronomical calendar, and has also made many innovations in machinery manufacturing. For example, he calculated that the pi was between 3.1415926 and 3.1415927, which was the best in the world up to the fifteenth century. He used 355/113 to express the density of pi, in the west,