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: Before the recent housing boom, there were 1426 houses inLawrence County. Now, there are 2000 houses. How many housesdid developers build during the housing boom?

574.0