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.

[Q]: susie 's father repaired the bookshelves in the reading room . if he has 210 books to be distributed equally on the 10 shelves he repaired how many books will each shelf contain ?
[A]: 21

[Q]: their last stop before leaving the zoo is the bird museum . there they went through 7 bird exhibits spending 9 minutes going around each exhibit . how much time did they spend going through the museum ?
[A]: 63

[Q]: we ordered 21 pizzas . each pizza has 8 slices . how many slices of pizza are there altogether ?
[A]:
168