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

Example Input: Problem: in x game of billiards , x can give y 20 points in 60 and he can give z 30 points in 60 . how many points can y give z in x game of 120 ?
Example Output: 30

Example Input: Problem: what is the sum of the numbers between 1 and 14 , inclusive ?
Example Output: 105

Example Input: Problem: a farmer has enough food to feed her 1000 cows for 50 days . after 10 days some of the cows run away and the food was now enough for the same period of 50 days as before . how many cows ran away ?
Example Output:
200