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

Example Input: Problem: a jar contains a mixture of ab in the ratio 4 : 1 . when 40 l of mixture is replaced with liquid b , ratio becomes 2 : 3 . how many liters of liquid a was present in mixture initially .
Example Output: 64

Example Input: Problem: the sum of all the digits of the integers from 18 to 21 inclusive is 24 ( 1 + 8 + 1 + 9 + 2 + 0 + 2 + 1 = 24 ) . what is the sum e of all the digits of the integers from 0 to 99 inclusive ?
Example Output: 900

Example Input: Problem: if the sides of a cube are in the ratio 5 : 3 . what is the ratio of their diagonals ?
Example Output:
5 : 3'