0.125x0.25x0.5x128=0.125x0.25x0.5x8×4×4=(0.125×8)×(0.25×4)×(0.5×4)=1×1×2=2
0.125x0.25x0.5x128=0.125x8x0.25x4x0.5x2x2=1x1x1x2=2