Definition: 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: Sara had 100 pennies and 783 quarters in her bank. Her dadborrowed 271 quarters from Sara. How many quarters does she havenow?

512.0