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.
Q: There are 53 maple trees currently in the park. Park workers willplant maple trees today. When the workers are finished there will be64 maple trees in the park. How many maple trees did the workersplant today?
A: 
11.0