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

Example Input: Problem: the cost of the paint is rs . 50 per kg . if 1 kg of paint covers 20 sq . ft , how much will it cost to paint outside of a cube having 20 feet each side
Example Output: rs . 6000

Example Input: Problem: you enter a weight loss challenge game and manage to lose 13 % of your body weight . for the final weigh in you are forced to wear clothes that add 2 % to your weight . what percentage of weight loss is measured at the final weigh in ?
Example Output: 11.26 %

Example Input: Problem: 102 ã — 102 + 98 ã — 98 = ?
Example Output:
2000