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.

Example Input: Shannon and her family use up a lot of strawberry and blueberry jelly, since they eat toast every morning. At the moment, they have acombined total of 6310 grams of jelly. If they have 4518 grams ofblueberry jelly, how many grams of strawberry jelly do they have?
Example Output: 1792.0

Example Input: There are 7.75 gallons of water in Becky's fish tank. If Becky adds 7.05 gallons more, how many gallons will there be in all?
Example Output: 14.8

Example Input: There are 112 short trees and 119 tall trees currently in the park.Park workers will plant 105 short trees today. How many short treeswill the park have when the workers are finished?
Example Output:
217.0