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

Example Input: Problem: audrey 4 hours to complete a certain job . ferris can do the same job in 3 hours . audrey and ferris decided to collaborate on the job , working at their respective rates . while audrey worked continuously , ferris took 5 breaks of equal length . if the two completed the job together in 2 hours , how many minutes long was each of ferris ' breaks ?
Example Output: 6

Example Input: Problem: the volume of water inside a swimming pool doubles every hour . if the pool is filled to its full capacity within 8 hours , in how many hours was it filled to one quarter of its capacity ?
Example Output: 6', 'e ) 7'

Example Input: Problem: if circles x and y have the same area and circle x has a circumference of 18 , half of the radius of circle y is :
Example Output:
4.5