37.5×21.5×0.112+35.5×12.5×0.112 =0.112×（37.5×21.5+35.5×12.5） =0.112×（12.5×3×21.5+35.5×12.5） =0.112×12.5×（3×21.5+35.5） =0.112×12.5×100 =1250×（0.1+0.01+0.002） =125+12.5+2.5 =140...