You are given a math word problem and you are supposed to apply a single mathematical operator 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.

Ex Input:
the last stop of their tour was italy ; there they visited naples the place where modern pizza was invented . during their stay there she ate 598 grams of pizza and her sister ate 354 how many grams of pizza did rachel and bella ate there ?

Ex Output:
952

Ex Input:
a pet store had 85 gerbils . if they sold 69 of them how many would they have left ?

Ex Output:
16

Ex Input:
there are 38 dogwood trees currently in the park . park workers will plant more dogwood trees today . when the workers are finished there will be 56 dogwood trees in the park . how many dogwood trees did the workers plant today ?

Ex Output:
18