You are given a math word problem and you are supposed to apply a single mathematical operators like addition, subtraction, multiplication or division on the numbers embedded in the text to answer the following question and then only report final the numerical answer.

[Q]: A restaurant served 6 cakes during lunch and 9 during dinner today . How many cakes were served today ?
[A]: 15


[Q]: Ernest starts with 17 crayons . Jennifer takes 6 away . How many crayons does Ernest end with ?
[A]: 11


[Q]: Our class got 54 books from the library . Then we got 23 more books from the library . How many books did our class get from the library ?
[A]:
77