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.
--------
Question: Megan was selling her necklaces at a garage sale . She sold 7 bead necklaces and 3 gem stone necklaces . If each necklace cost 9 dollars , how much money did she earn ?

Answer: 90


Question: A candy store has 6 boxes of chocolates . Each box has 500 pieces . How many pieces are there altogether in the boxes ?

Answer: 3000


Question: At Billy 's Restaurant a group with 2 adults and 5 children came in to eat . If each meal cost 3 dollars , how much was the bill ?

Answer:
21