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

Example Input: Problem: a car gets 24 miles to the gallon . if it is modified to use a solar panel , it will use only 75 percent as much fuel as it does now . if the fuel tank holds 12 gallons , how many more miles will the car be able to travel , per full tank of fuel , after it has been modified ?
Example Output: 96

Example Input: Problem: a can do a piece of work in 80 days . he works at it for 10 days b alone finishes the remaining work in 42 days . in how much time will a and b working together , finish the work ?
Example Output: 30

Example Input: Problem: a man is 24 years older than his son . in six years , his age will be twice the age of his son . the present age of the son is
Example Output:
non