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.

Ex Input:
Mike has 87 baseball cards . Sam bought 13 of Mike 's baseball cards . How many baseball cards does Mike have now ?

Ex Output:
74


Ex Input:
I have 648 pencils . If I put 4 pencils in each pencil box , how many pencil boxes will I fill ?

Ex Output:
162


Ex Input:
There is 0.16666666666666666 cup of oil in Scarlett 's measuring cup . If Scarlett adds 0.6666666666666666 cup more , how much oil will be in the measuring cup ?

Ex Output:

0.8333333333333334