0.25*32*1.25=0.25*4*8*1.25=1*10=10
如图
0.25x32x1.25=(0.25x4)x(8x1.25 )=1x10=10
0.25x32x1.25=0.25x4x8x1.25=1x10=10
=0.25*4*4*1.25*2=1*5*2=10
