（81.4+1/6+1/4+1/5）÷（1/4+1/5+1/6）
=81.4÷(1/4+1/5+1/6)+1
=81.4÷[(15+12+10)/60]+1
=(74+7.4)*60/37+1
=(2+0.2)*60+1
=120+12+1=133