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

[EX Q]: Luke was putting his spare change into piles . He had 5 piles of quarters and 5 piles of dimes . If each pile had 3 coins in it , how many coins did he have total ?
[EX A]: 30

[EX Q]: Rachel bought 7 new chairs and 3 new tables for her house . If she spent 4 minutes on each piece furniture putting it together , how many minutes did it take her to finish ?
[EX A]: 40

[EX Q]: Maria bought 2 new chairs and 2 new tables for her house . If she spent 8 minutes on each piece furniture putting it together , how many minutes did it take her to finish ?
[EX A]:
32