math

[input](25/32) / (15/56)[/input]
( 25/32 ) / ( 15/56)
( 25/32 ) * (56/15)
( 25 * 56 )/(32 *15 ) | div by 5
( 5 * 56 )/(32 *3 ) | div by 8
( 5 * 7 )/( 4 *3 )
35 / 12