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

Example Input: Problem: a dishonest dealer professes to sell goods at the cost price but uses a weight of 800 grams per kg , what is his percent ?
Example Output: 25 %

Example Input: Problem: if 2 men or 3 women can reap a field in 10 days how long will 4 men and 5 women take to reap it ?
Example Output: 11 / 30

Example Input: Problem: three rugs have a combined area of 212 square meters . by overlapping the rugs to cover floor area of 140 square meters , the area that is covered by exactly two layers of rug is 24 square meters . what is the area that is covered with three layers of rug ?
Example Output:
24 square meters