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

Ex Input:
Problem: a , b , c , d , e , f , g , h sitting in a row what is the probability that a , b , c sitting together ?

Ex Output:
3 / 28

Ex Input:
Problem: if | 5 x - 20 | = 100 , then find the sum of the values of x ?

Ex Output:
8

Ex Input:
Problem: workers decided to raise rs . 3 lacs by equal contribution from each . had they contributed rs . 50 eachextra , the contribution would have been rs . 3.75 lacs . how many workers were they ?

Ex Output:
1500