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]: Gwen was organizing her book case making sure each of the shelves had exactly 9 books on it . If she had 3 shelves of mystery books and 5 shelves of picture books , how many books did she have total ?
[A]: 72


[Q]: Joan spent $ 15 on shorts and $ 14.82 on a jacket , and $ 12.51 on a shirt . She went to 3 shops . In total , how much money did Joan spend on clothing ?
[A]: 42.33


[Q]: Adam bought 9 packages of cat food and 7 packages of dog food . Each package of cat food contained 10 cans , and each package of dog food contained 5 cans . How many more cans of cat food than dog food did Adam buy ?
[A]:
55