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.

Example input: Rachel strolled to Nicholas 's house . It is 10 miles from Rachel 's house to Nicholas 's house . It took Rachel 5 hours to get there . How fast did Rachel go ?
Example output: 2
Example explanation: Rachel's speed = distance/time = 10/5 = 2
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