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

Example Input: Problem: the average weight of 8 person ' s increases by 3 kg when a new person comes in place of one of them weighing 70 kg . what might be the weight of the new person ?
Example Output: 94 kg

Example Input: Problem: the total age of a and b is 14 years more than the total age of b and c . c is how many years younger than a ?
Example Output: 14

Example Input: Problem: two cyclist start on a circular track from a given point but in opposite direction with speeds of 7 m / s and 8 m / s . if the circumference of the circle is 630 meters , after what time will they meet at the starting point ?
Example Output:
42 sec