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

Example Input: Problem: if p represents the product of the first 16 positive integers , then p is not a multiple of
Example Output: 5

Example Input: Problem: a train crosses a bridge of length 200 m in 10 seconds and a lamp post on the bridge in 5 seconds . what is the length of the train in metres ?
Example Output: 200 m

Example Input: Problem: when jessica withdrew $ 200 from her bank account , her account balance decreased by 2 / 5 . if she deposits an amount equal to 2 / 3 of the remaining balance , what will be the final balance in her bank account ?
Example Output:
500