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]: Tom bought a skateboard for $ 9.46 , and spent $ 9.56 on marbles . Tom also spent $ 14.5 on shorts . In total , how much did Tom spend on toys ?
[A]: 19.02


[Q]: Mrs. Sheridan has 11 cats . Mrs. Garrett has 24 cats . How many more cats does Mrs. Garrett have than Mrs. Sheridan ?
[A]: 13


[Q]: 231 birds were sitting in a tree . Some more fly up to the tree . Then there were 312 birds in the tree . How many more fly up to the tree ?
[A]:
81