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:
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


Ex Input:
Kevin starts with 7 cards . He finds another 47 . How many cards does Kevin end with ?

Ex Output:
54


Ex Input:
Each child has 5 bottle caps . If there are 9 children , how many bottle caps are there in total ?

Ex Output:

45