You are given a math word problem and you are supposed to apply a single mathematical operator like addition, subtraction, multiplication, or division on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

Ex Input:
tom had $ 19 and he wanted to buy as many folders as he could . if 1 folder costs $ 2 how many folders can tom buy ?

Ex Output:
9.5

Ex Input:
maria had 67 pieces of candy . she ate 64 pieces . how many pieces of candy does maria have now ?

Ex Output:
3

Ex Input:
a museum had 13 paintings . if they got rid of 8 of them how many pictures would they have left ?

Ex Output:
5