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

Example Input: Problem: the average of 10 numbers is 0 . in those 10 , at the least , how many may be greater than or equal to zero ?
Example Output: 1

Example Input: Problem: one fast typist type some matter in 4 hrs and another slow typist type the same matter in 6 hrs . if both do combine in how much time they will take to finish .
Example Output: 2 hr 24 mins

Example Input: Problem: in a 100 m race , sam beats john by 5 seconds . on the contrary , if sam allowed john to start 15 m ahead of sam , then sam and john reach the finishing point at the same time . how long does sam take to run the 100 m race ?
Example Output:
17 second