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

Example Input: Problem: a cycle is bought for rs . 900 and sold for rs . 1170 , find the gain percent ?
Example Output: 30 %

Example Input: Problem: a jeep takes 9 hours to cover a distance of 480 km . how much should the speed in kmph be maintained to cover the same direction in 3 / 2 th of the previous time ?
Example Output: 35 kmph

Example Input: Problem: if a sum of money doubles itself in 10 years at simple interest , the ratepercent per annum is
Example Output:
10