You are given a math word problem and you are supposed to apply a single mathematical operators like addition, subtraction, multiplication or division on the numbers embedded in the text to answer the following question and then only report final the numerical answer.
Q: There are 37 short bushes and 30 tall trees currently in the park . Park workers will plant 20 short bushes today . How many short bushes will the park have when the workers are finished ?
A: 
57