9÷6/7=9×( 7/6 )
30÷5/6=30×(6/5 )
4×(3/2 )=4÷2/3
( 4 )÷5/7=4×7/5
3÷4/5=3×5/4
( 24 )÷7/ 16=24×( 16/7 )
A÷C/B=A×B/C