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:
A carpenter bought a piece of wood that was 0.43 meters long. Thenshe sawed 0.33 meters off the end. How long is the piece of woodnow?

Ex Output:
0.1


Ex Input:
Kelly's chemistry textbook weighs 7.125 pounds and her geometrytextbook weighs 0.625 pound. How much more does the chemistrytextbook weigh than the geometry textbook?

Ex Output:
6.5


Ex Input:
Fred found 47 seashells on the beach, he gave Jessica 25 of theseashells. How many seashells does he now have?

Ex Output:

22.0