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]: The schools debate team had 28 boys and 4 girls on it . If they were split into groups of 4 how many groups could they make ?
[EX A]: 8

[EX Q]: A furniture store marks up items 20 % . It the furniture store buys a couch for 350 dollars , what will the selling price be , in dollars ?
[EX A]: 420

[EX Q]: Zoe had 15 songs on her mp3 player . If she deleted 8 old songs from it and then added 50 new songs , how many songs does she have on her mp3 player ?
[EX A]:
57