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]: The school cafeteria ordered 42 red apples and 7 green apples for students lunches . But , if only 9 students wanted fruit , how many extra did the cafeteria end up with ?
[EX A]: 40

[EX Q]: For a birthday party Cody bought 4 regular sodas and 44 diet sodas . If his fridge would only hold 6 on each shelf , how many shelves would he fill up ?
[EX A]: 8

[EX Q]: Chloe was organizing her book case making sure each of the shelves had exactly 6 books on it . If she had 5 shelves of mystery books and 4 shelves of picture books , how many books did she have total ?
[EX A]:
54

