You are given a math word problem and you are supposed to apply multiple mathematical operators 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.
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Question: A worksheet had 3 problems on it . If a teacher had 15 worksheets to grade and had already graded 7 of them , how many more problems does she have to grade ?

Answer: 24


Question: Luke made 9 dollars mowing lawns and 18 dollars weed eating . If he only spent 3 dollar a week , how long would the money last him ?

Answer: 9


Question: There were 7 friends playing a video game online when 2 more players joined the game . If each player had 7 lives , how many lives did they have total ?

Answer:
63