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:
There were 2 red orchids and 4 white orchids in the vase. Jessica cutsome red orchids from her flower garden. There are now 18 redorchids in the vase. How many red orchids did she cut?

Ex Output:
16.0


Ex Input:
Each day, the polar bear at Richmond's zoo eats 0.2 bucket of troutand 0.4 bucket of salmon. How many buckets of fish does the polarbear eat daily?

Ex Output:
0.6


Ex Input:
The Richmond Tigers sold a total of 9570 tickets last season. If theysold 3867 tickets in the first half of the season, how many tickets didthey sell in the second half?

Ex Output:

5703.0