101×62.5-1.25×6.25×8=101×62.5-0.125×62.5×8=101×62.5-0.125×8×62.5=101×62.5-1×62.5=(101-1)×62.5=100×62.5=6250
40×27×5=2×20×27×5=(2×27)×(20×5)=54×100=5400
40x27x5=40x5x27=200x27=5400