28*25*7如何简便计算
问题描述：
28*25*7如何简便计算
答
28*25*7
=4*7*25*7
=7*7*4*25
=49*100
=4900
28*25*7如何简便计算
28*25*7
=4*7*25*7
=7*7*4*25
=49*100
=4900