You are provided with an arithmetic question. Your task is to compute the solution using the given arithmetic operations. The only arithmetic operators needed to answer the questions are'+'(addition) and'-'(subtraction). The answer should be correct to one decimal place.

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

Ex Output:
0.3


Ex Input:
Jessica spent $10.2 on a cat toy, and a cage cost her $11.7. What was the total cost of Jessica's purchases?

Ex Output:
21.9


Ex Input:
Keith grew 6 turnips. Alyssa grew 9 turnips. How many turnips didthey grow in all?

Ex Output:

15.0