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

Example Input: Problem: a , b and c start a business each investing 20,000 . after 6 months a withdrew 5000 , b withdrew 4000 and c invests 6000 more . at the end of the year , a total profit of 67,600 was recorded . find the share of b .
Example Output: 21,600

Example Input: Problem: a train passes a platform in 32 seconds . the same train passes a man standing on the platform in 20 seconds . if the speed of the train is 54 km / hr , the length of the platform is
Example Output: 180 meter

Example Input: Problem: if the least common multiple of two prime numbers x and y is 10 , where x < y , then the value of 3 x + y is
Example Output:
11