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.

Ex Input:
Some insects called aphids attack a large farm. In response, thefarmer releases ladybugs onto the fields. There are 12170 ladybugswith spots and 54912 ladybugs without spots. How many ladybugsare there in all?

Ex Output:
67082.0


Ex Input:
There are 37 short bushes and 30 tall trees currently in the park. Parkworkers will plant 20 short bushes today. How many short busheswill the park have when the workers are finished?

Ex Output:
57.0


Ex Input:
Sally had 39 baseball cards, and 9 were torn. Sara bought 24 of Sally's baseball cards. How many baseball cards does Sally have now?

Ex Output:

15.0