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]: Joan found 79 seashells on the beach , she gave Mike 63 of the seashells . How many seashells does she now have ?
[A]: 16


[Q]: Before December , customers buy 1346 ear muffs from the mall . During December , they buy 6444 , and there are none . In all , how many ear muffs do the customers buy ?
[A]: 7790


[Q]: There are 33 walnut trees currently in the park . Park workers will plant 44 walnut trees today . How many walnut trees will the park have when the workers are finished ?
[A]:
77