1÷（2÷3）÷（3÷4）÷（4÷5）÷（5÷6）÷（6÷7）÷（7÷8）=;B0P8~2h+U5A-P,^,y4W7I(s-p(o4c6{-h'`9y4U,S.W0B'\7W
算式：提示7I9H:q-i,x/a*l3F+I)D(i8I:T7I(s-p(o4c6{-h'`9y4U,S.W0B'\7W