You are given a math word problem and you are supposed to apply addition or subtraction mathematical operators on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

Ex Input:
Greg and Sharon own neighboring cornfields . Greg harvested 0.4 acre of corn on Monday and Sharon harvested 0.1 acre . How many more acres did Greg harvest than Sharon ?

Ex Output:
0.3


Ex Input:
During a canned food drive , items were sorted into bins . The drive resulted in 0.125 bin of soup , 0.125 bin of vegetables , and 0.5 bin of pasta . Altogether , how many bins would the canned food take up ?

Ex Output:
0.75


Ex Input:
Haley and her mom were picking carrots from their garden . Haley picked 39 and her mother picked 38 . If only 64 of the carrots were good , how many bad carrots did they have ?

Ex Output:

13