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

Ex Input:
Christian and the junior ranger brought a bag of 140 nails as they visited every station assigned to the junior ranger . If they left exactly 7 nails in every station they visited , how many stations did Joline and the junior ranger visit ?

Ex Output:
20


Ex Input:
Paula 's aunt gave her $ 109 to spend on clothes at the mall . She bought 2 shirts that cost $ 11 each and a pair of pants that cost $ 13 . How much money does Paula have left to buy more clothes ?

Ex Output:
74


Ex Input:
At the fair Adam bought 13 tickets . After riding the ferris wheel he had 4 tickets left . If each ticket cost 9 dollars , how much money did Adam spend riding the ferris wheel ?

Ex Output:

81