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.

Nancy had 80 files on her computer . She deleted 31 of them and put the rest into folders with 7 files in each one . How many folders did Nancy end up with ?
7

A new building needed 11 windows . The builder had already installed 4 of them . If it takes 8 hours to install each window , how long will it take him to install the rest ?
56

John had 5 action figures , but needed 7 total for a complete collection . If each one costs $ 5 , how much money would he need to finish his collection ?

10