You are given a math word problem and you are supposed to apply addition or subtraction 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: Your class had a pizza party . 0.375 of a pizza was left over , and 0.5 of another pizza was left over . You put them both into one box . How much pizza do you have altogether ?

Answer: 0.875

Question: Harold has 53 marbles . He gets 16 more from Steve . How many marbles does Harold have in all ?

Answer: 69

Question: At Oliver 's Restaurant a group with 2 adults and 4 children came in to eat . If each meal cost 3 dollars , how much was the bill ?

Answer:
18