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

Example Input: Problem: what is the sum of natural numbers between 30 and 100
Example Output: 4615

Example Input: Problem: in a garment industry , 12 men working 9 hours per day complete a piece of work in 10 days . to complete the same work in 12 days , working 15 hours a day , the number of men required is :
Example Output: 7

Example Input: Problem: the average temperature for monday , tuesday , wednesday and thursday was 48 degrees and for tuesday , wednesday , thursday and friday was 46 degrees . if the temperature on monday was 42 degrees . find the temperature on friday ?
Example Output:
34