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: Kevin bought 2 watermelons. The first watermelon was 9.9 pounds,and the second watermelon was 4.1 pounds. How many pounds ofwatermelon did Kevin buy?
Example Output: 14.0

Example Input: Dan had 14 peaches and 10 pears at his roadside fruit dish. He wentto the orchard and picked peaches to stock up. There are now 85peaches. how many did he pick?
Example Output: 71.0

Example Input: An oil pipe in the sea broke. Before engineers started to fix the pipe,2475 gallons of oil leaked into the water. A total of 6206 gallons of oilleaked before the pipe was fixed. How many gallons of oil leakedwhile the engineers were fixing the pipe?
Example Output:
3731.0