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

Input: Consider Input: Problem: the average score of a cricketer in 2 matches is 60 and in other 3 matches is 50 . then find the average score in all the 5 matches ?

Output: 54


Input: Consider Input: Problem: a man can do a piece of work in 7 days , but with the help of his son , he can finish it in 3 days . in what time can the son do it alone ?

Output: 4 1 / 5


Input: Consider Input: Problem: if x represents the product of the first 15 positive integers , then x is not a multiple of :


Output: d ) 57