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:
Sam found 35 seashells on the beach , he gave Joan 18 of the seashells . How many seashells does he now have ?

Ex Output:
17


Ex Input:
Johnny practiced for the track team and ran 3 laps per minute . How many minutes did it take Johnny to run 10 laps ?

Ex Output:
3.33333


Ex Input:
Clarence has 99 tickets . He gives 7 to Eugene . How many tickets will Clarence have ?

Ex Output:

92