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: Joan's high school played 864 baseball games this year, 128 of thegames were played at night. She attended 395 games. How manybaseball games did Joan miss?
Example Output: 469.0

Example Input: Professor Ellison weighed 2 pieces of metal for an experiment. Thepiece of iron weighed 11.16 pounds and the piece ofaluminum weighed 0.86 pound. How much moredid the piece of iron weigh than the piece of aluminum?
Example Output: 10.3

Example 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?
Example Output:
0.3