99*7.56+7.56
=7.56*(99+1)
=7.56*100
=756
2.5*3.2 *1.25
=2.5*4*0.8*1.25
=10*1
=10
【0.125+1.25+12.5】*8
=0.125*8+1.25*8+12.5*8
=1+10+100
=111