脱式计算6l:d(\.b;q+\/P;D+k4K9F
420÷7÷66l:d(\.b;q+\/P;D+k4K9F
算式：提示9`2J*h'^1\(@+I4\0`1x6u2d6l:d(\.b;q+\/P;D+k4K9F
=3`2z([.e;r8I.f*X-d2^9m;h(h6l:d(\.b;q+\/P;D+k4K9F