计算：0.62× 0.73 +6.2×0.027=0.62x0.73+0.62x0.27=0.62x（0.73+0.27）=0.62x1=0.62
=0.62×0.73+0.62×10×0.027=0.62×0.73+0.62×0.27=0.62(0.73+0.27)=0.62×1=0.62
0.73和6.2之间应该有符号吧？
