60%*80%+40%*20%=0.48+0.08=0.52
60%*80%+40%*20%=0.6*0.8+0.4*0.2=0.48+0.08=0.56=56%
占有56%D的股权
0
60%*80%+40%*20%=0.48+0.08=0.52
60%*80%+40%*20%=0.6*0.8+0.4*0.2=0.48+0.08=0.56=56%
占有56%D的股权