<今日教學進度>
https://www.youtube.com/watch?v=nI5I07l7fB0
中國古代的頂級數學家,憑一人之力,將“圓周率”精算到小數第7位!
https://www.youtube.com/watch?v=WaKVfJ_BUR0
https://www.youtube.com/watch?v=a7i_HpR6byY