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

Example Input: Problem: a car started running at a speed of 30 km / hr and the speed of the car was increased by 2 km / hr at the end of every hour . find the total distance covered by the car in the first 11 hours of the journey .
Example Output: 440 km

Example Input: Problem: if | x - 9 | = 3 x , then x = ?
Example Output: - 4.

Example Input: Problem: the value of 3.6 x 0.48 x 2.50 / 0.12 x 0.09 x 0.5 is
Example Output:
800