3.14*0.125*0.8+0.1*68.6
=3.14+6.86
=10那31.4*0.125*0.8+0.1*68.6呢上面的做错了31.4*0.125*0.8+0.1*68.6=31.4×0.1+0.1×68.6=3.14+6.86=10