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.

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

Output: 512

Input: Consider Input: michael has some fish in his fish tank . ben gave him 18 more fish . now he has 49 how many fish did he have to begin with ?

Output: 31

Input: Consider Input: 5 boats are in the lake . each boat has 3 people . how many people are on boats in the lake ?
Output: 15