91 --- * 54 = ??? (дробь) 42

Question

91
--- * 54 = ??? (дробь)
42

Answer 1

91/42 *54 = 91*54:42 = 4914:42=117
Можно сначала сократить
91/42*54 = 91/21*27 = 91*27:21=2457:21 = 117