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.

Input: Consider Input: A dust storm sweeps across the prairie. It covers 64535 acres of theprairie in dust, but leaves 522 acres untouched. How many acresdoes the prairie cover?

Output: 64013.0


Input: Consider Input: Joan found 72 seashells and 12 starfishes on the beach. She gaveAlyssa some of her seashells. She has 28 seashell. How manyseashells did she give to Alyssa?

Output: 44.0


Input: Consider Input: There are 46 rulers in the drawer. Tim took 25 rulers from the drawer. How many rulers are now in the drawer?


Output: 21.0