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

Example Input: Problem: find the area of a parallelogram with base 10 cm and height 20 cm .
Example Output: 200

Example Input: Problem: p , q and r together earn rs . 1710 in 9 days . p and r can earn rs . 600 in 5 days . q and r in 7 days can earn rs . 910 . how much amount does r can earn per day ?
Example Output: s . 60

Example Input: Problem: the h . c . f . of two numbers is 15 and the other two factors of their l . c . m . are 11 and 15 . the larger of the two numbers is :
Example Output:
225