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.
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Question: 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 ?

Answer: 81


Question: A chef needs to cook 13 potatoes . He has already cooked 5 . If each potato takes 6 minutes to cook , how long will it take him to cook the rest ?

Answer: 48


Question: It took Amanda 2 hours to stroll to Kimberly 's house at 4 miles per hour . How far is it between Amanda 's house and Kimberly 's house ?

Answer:
8