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

Example Input: Problem: what is the diagonal of a square field whose perimeter is 64 m ?
Example Output: 16 √ 2 m

Example Input: Problem: a certain rectangular crate measures 8 feet by 14 feet by 16 feet . a cylindrical gas tank is to be made for shipment in the crate and will stand upright when the crate is placed on one of its six faces . what should the radius of the tank be if it is to be of the largest possible volume ?
Example Output: 6

Example Input: Problem: if a : b : : 3 : 7 , then what is ( 5 a + 2 b ) : ( a - 2 b ) ?
Example Output:
- 29 : 11