66.6×21.7+33.3×56.633.3*2*21.7+33.3*56.6=33.3*（43.4+56.6)=33.3*100=3330
=33.3×2×21.7+33.3×56.6=33.3×(43.4+56.6)=33.3×100=3330
你妈的，你是魔鬼吧！
