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

Example Input: Problem: the cash realised on selling a 14 % stock is rs . 106.25 , brokerage being 1 / 4 % is ?
Example Output: 106

Example Input: Problem: a , b and c , each working alone can complete a job in 6 , 8 and 12 days respectively . if all three of them work together to complete a job and earn $ 1170 , what will be b ' s share of the earnings ?
Example Output: $ 390

Example Input: Problem: if log 10 2 = 0.3010 , the value of log 10 80 is :
Example Output:
1.903