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:
Dan has 5 blue marbles . Mary has 2 times more blue marbles than Dan . How many blue marbles does Mary have ?

Ex Output:
10


Ex Input:
Ruby has 63 apples . Emily takes 55 away . How many apples will Ruby have ?

Ex Output:
8


Ex Input:
Jason has 43 blue and 16 red marbles . Tom has 24 blue marbles . How many blue marbles do they have in all ?

Ex Output:

67