Burning a candle for 1 hour lasts her 8 nights so if she burns for 2 hours it will last her 8/2 = <<1*8/2=4>>4 nights

1 candle now lasts 4 nights and she needs enough for 24 nights so she needs 24/4 = <<24/4=6>>6 candles

# Answer

6
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Carmen burns a candle for 1 hour every night.  A candle will last her 8 nights.  If she burns the candle for 2 hours a night, how many candles will she use over 24 nights?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
6
Carmen burns a candle for 1 hour every night.  A candle will last her 8 nights.  If she burns the candle for 2 hours a night, how many candles will she use over 24 nights?
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