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

Input: Consider Input: Problem: if a ã — b = 2 a - 3 b + ab , then 3 ã — 2 + 2 ã — 3 is equal to :

Output: 7


Input: Consider 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 .

Output: 64


Input: Consider Input: Problem: if - 3 x + 5 y = 48 and 3 x - 2 y = 6 , what is the product of x and y ?


Output: 252