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

Example Input: Problem: how many digits are required to number a book containing 240 pages ?
Example Output: 612

Example Input: Problem: james took a 3 - hour bike ride . in the second hour he travlled 12 miles , which was 20 percent farther than he traveled the first hour . if he traveled 25 percent farther in the third hour than he did in the second hour , how many miles did jose travel during the entire ride ?
Example Output: 37.0

Example Input: Problem: if there are only 2 wheelers and 4 wheelers parked in a school located at the heart of the city , find the number of 4 wheelers parked there if the total number of wheels is 66 ?
Example Output:
16