1*3*24+2*6*48+3*9*72/1*2*4+2*4+3*6*12

问题描述:

1*3*24+2*6*48+3*9*72/1*2*4+2*4+3*6*12

(1*3*24+2*6*48+3*9*72)/(1*2*4+2*4+3*6*12)
=1*3*24*(1+2+3)/[1*2*4*(1+2+3)]
=1*3*24/(1*2*4)
=72/8
=9