39.9*(1+90%)÷3/8-106.4
=39.9×(1+0.9)×8/3-106.4
=39.9×1.9×8/3-106.4
=13.3×(2-0.1)×8-106.4
=(26.6-1.33)×8-106.4
=25.27×8-106.4
=202.16-106.4
=95.76
39.9*(1+90%)÷3/8-106.4
=39.9×(1+0.9)×8/3-106.4
=39.9×1.9×8/3-106.4
=13.3×(2-0.1)×8-106.4
=(26.6-1.33)×8-106.4
=25.27×8-106.4
=202.16-106.4
=95.76