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

Example Input: Problem: the average of 6 no . ' s is 3.95 . the average of 2 of them is 3.8 , while the average of theother 2 is 3.85 . what is the average of the remaining 2 no ' s ?
Example Output: 4.2

Example Input: Problem: what is 82 % of 3 / 5 ?
Example Output: 0.492

Example Input: Problem: cost is expressed by the formula tb ^ 4 . if b is doubled , the new cost w is what percent of the original cost ?
Example Output:
w = 1600