(4○6)÷(5○4)= (4×5×6×7×8×9) ÷ (5×6×7×8)= 4×9= 36
4○6=4×5×6×7×8×95○4=5×6×7×8(4○6)÷(5○4)=36
4○6=4*5*6*7*8*9,5○4=5*6*7*8,所以:(4○6)÷(5○4)=4*9=36
360