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

Ex Input:
Problem: if p and q are both odd prime numbers andp < q , then how many different positive integer factors does 2 pqhave ?

Ex Output:
8

Ex Input:
Problem: a solution contains 8 parts of water for every 7 parts of lemonade syrup . how many parts of the solution should be removed and replaced with water so that the solution will now contain 25 % lemonade syrup ?

Ex Output:
2.14

Ex Input:
Problem: the present population of a town is 3744 . population increase rate is 20 % p . a . find the population of town before 2 years ?

Ex Output:
2600