原式=48*48*36÷64 =6*8*6*8*36÷64 =6*6*36 =1296
48×36÷64×48 =48×9×4÷(4×16)×48=48×9×4÷4÷16×48=(48÷16)×(9×48)=3×432=1296
48*36/64*48=1 296
