The task is to generate the correct answer for a given math problem.

Ex Input:
Problem: if 2 men or 3 women can reap a field in 10 days how long will 4 men and 5 women take to reap it ?

Ex Output:
11 / 30


Ex Input:
Problem: one half of a two digit number exceeds its one third by 7 . what is the sum of the digits of the number ?

Ex Output:
e ) 1


Ex Input:
Problem: if 2 + 3 = 13 ; 3 + 5 = 31 ; 5 + 7 = 59 , then 7 + 9 = ?

Ex Output:

95