102.31*59+7/1*102.31+40又7/6*102.31
问题描述：
102.31*59+7/1*102.31+40又7/6*102.31
答
参考：102.31*59+7/1*102.31+40又7/6*102.31=
1/7×102.31+40又6/7×102.31=102.31 x(1/7+286/7)
=102.31 x 287/7
=102.31 x41
=102.31 x (40+1)
=4092.4+102.31
=4194.71