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: Will invited 9 friends to a birthday party , but 4 could n't come . If he wanted to buy enough cupcakes so each person could have exactly 8 , how many should he buy ?

Answer: 40

Question: The school is planning a field trip . There are 180 students and 60 seats on each school bus . How many buses are needed to take the trip ?

Answer: 3

Question: At a restaurant each adult meal costs $ 2 and kids eat free . If a group of 15 people came in and 9 were kids , how much would it cost for the group to eat ?

Answer:
12