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: A marine biologist measured 1 fish that was 0.3 foot long and a second fish that was 0.2 foot long . How much longer was the first fish ?
Example Output: 0.1

Example Input: Robin had 18 pieces of gum . Her brother gave her some more pieces . Now Robin has 44 pieces in all . How many pieces of gum did Robin 's brother give her ?
Example Output: 26

Example Input: A restaurant made 9 hamburgers and 4 hot dogs to serve during lunch . Only 3 hamburgers were actually served . How many hamburgers were over ?
Example Output:
6