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

Example Input: Problem: working together , wayne and his son can shovel the entire driveway in three hours . if wayne can shovel six times as fast as his son can , how many hours would it take for his son to shovel the entire driveway on his own ?
Example Output: 7

Example Input: Problem: a certain experimental mathematics program was tried out in 2 classes in each of 38 elementary schools and involved 44 teachers . each of the classes had 1 teacher and each of the teachers taught at least 1 , but not more than 3 , of the classes . if the number of teachers who taught 3 classes is n , then the least and greatest possible values of n , respectively , are
Example Output: 0 and 16

Example Input: Problem: how many cubes of 20 cm edge can be put in a cubical box of 1 m edge .
Example Output:
125 cm