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

Example Input: Problem: 12 men work 8 hours per day to complete the work in 10 days . to complete the same work in 8 days , working 15 hours a day , the number of men required ?
Example Output: 8 days

Example Input: Problem: there are 7 executives , including the ceo and cfo , that are asked to form a small team of 4 members . however , the ceo and cfo may not both be assigned to the team . given this constraint , how many ways are there to form the team ?
Example Output: 25

Example Input: Problem: a train 200 m long can cross an electric pole in 5 sec and then find the speed of the train ?
Example Output:
144