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.

[EX 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 ?
[EX A]: 77

[EX Q]: Jane has 28 old , brown sheets of drawing paper and 27 old , yellow sheets of drawing paper . How many pieces of drawing paper does she have ?
[EX A]: 55

[EX Q]: Mrs. Hilt and her sister drove to a concert 78 miles away . They drove 32 miles and then stopped for gas . Her sister put 28 gallons of gas in the car . How many miles did they have left to drive ?
[EX A]:
46