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.

Example Input: Christine wandered 20 miles at 4 miles per hour . How long did Christine wander ?
Example Output: 5

Example Input: Sara goes fishing with Melanie . Sara catches 5 trout . Melanie catches 2 times as many trout as Sara . How many trout did Melanie catch ?
Example Output: 10

Example Input: A petri dish originally contained 600 bacteria . A scientist let the bacteria grow and now there are 8917 of them . How many more bacteria are there now ?
Example Output:
8317