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.

[EX Q]: carol was sending out birthday invitations to her friends . if each package of invitations she bought had 9 invitations in it and she bought 5 packs how many friends can she invite ?
[EX A]: 45

[EX Q]: gwen was organizing her book case making sure each of the shelves had exactly 4 books on it . if she had 5 shelves of mystery books and 3 shelves of picture books how many books did she have total ?
[EX A]: 32

[EX Q]: a trivia team had 9 members total but during a game 3 members did n't show up . if each member that did show up scored 2 points how many points were scored total ?
[EX A]:
12