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.

Example Input: isabel had 68 pieces of candy . her friend gave her 25 more pieces . how many pieces of candy did isabel have total ?
Example Output: 93

Example Input: he also had 8 aquariums for saltwater animals . each aquarium has 64 animals in it . how many saltwater animals does tyler have ?
Example Output: 512

Example Input: when amy got to the fair she had $ 15 . when she left she had $ 11 . how much money did she spend at the fair ?
Example Output:
4