1.25×32×6.4=1.25*8*4*6.4=10*25.6=256
1.25×32×6.4=1.25×8×4×6.4=10×4×6.4=40×6.4=256
1.25×32×6.4=1.25*8*4*6.4=10*4*6.4=40*6.4=256
1.25*32*6.4=1.25*8*4*8*8*0.1=10*0.1*4*8*8=16*16=256
把32拆成4乘8