3.75*4.23*36-125*0.423*2.8
=3.75*4.23*36-1.25*4.23*28
=4.23(3.75*36-1.25*28)
=4.23【1.25(3*36-28)】
=4.23(1.25*80)
=4.23*100
=423
3.75*4.23*36-125*0.423*2.8
=3.75*4.23*36-1.25*4.23*28
=1.25*3*4.23*36-1.25*4.23*28
=1.25*4.23*3*36-1.25*4.23*28
=1.25*4.23*(3*36-28)
=1.25*4.23*(108-28)
=1.25*4.23*80
=100*4.23
=423