You are given a math word problem and you are supposed to apply multiplication or division mathematical operators on the numbers embedded in the text to answer the following question and then only report the final numerical answer.
Example: Maria has 3 boxes of eggs . Each box holds 7 eggs and there are 8 boxes in a case . How many eggs does Maria have ?
Example solution: 21
Example explanation: Total number of eggs that Maria has is 3*7 = 21

Problem: Tom bought 12 boxes of chocolate candy and gave 7 to his little brother . If each box has 6 pieces inside it , how many pieces did Tom still have ?

Solution: 30