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

Example Input: Problem: on a certain road , 10 % of the motorists exceed the posted speed limit and receive speeding tickets , but 20 % of the motorists who exceed the posted speed limit do not receive speeding tickets . what percent of the motorists on that road exceed the posted speed limit ?
Example Output: 12.5 %

Example Input: Problem: tim came second in math . when his mother asked him how much he had scored , he answered that he got the sum of the first 12 even numbers . his mother immediately worked out the answer . how much had he scored in math ?
Example Output: 156

Example Input: Problem: a can do a work in 24 days and b can do it in 12 days . in how many days a and b can do the work ?
Example Output:
8 day