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]: When Joan was visited by the toothfairy , she received 14 each of quarters , half - dollars , and dimes . How much money did the toothfairy leave Joan ?
[EX A]: 11.9

[EX Q]: A restaurant sold 63 hamburgers last week . How many hamburgers on average were sold each day ?
[EX A]: 9

[EX Q]: Jerry is at the library helping put away books . There are 34 book to put away total but a librarian takes 7 of them and leaves Jerry with the rest . If he can fit 3 books on a shelf , how many shelves will he need ?
[EX A]:
9