You are given a math word problem and you are supposed to apply multiple mathematical operators like addition, subtraction, multiplication or division on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

[Q]: Sarah was planting vegetables in her garden . She started with 21 seeds and planted 12 of them in the big garden and in each of her small gardens put 3 seeds each . How many small gardens did Sarah have ?
[A]: 3


[Q]: 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 ?
[A]: 30


[Q]: Tom was putting his spare change into piles . He had 2 piles of quarters and 4 piles of dimes . If each pile had 5 coins in it , how many coins did he have total ?
[A]:
30