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

Answer: 21,600


Question: Problem: . 005 / ? = . 01

Answer: . 5


Question: Problem: if x * y = xy – 2 ( x + y ) for all integers x and y , then 3 * ( – 3 ) =

Answer:
– 9