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

Example 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 ?
Example Output: 2.14

Example Input: Problem: the average of first six prime numbers greater than 20 is ?
Example Output: 3

Example Input: Problem: what is the maximum number of points that 10 circles of different radii intersect ?
Example Output:
90