The sound level in St. Maria Goretti's Catholic Secondary School's cafeteria at lunch time is 63 dB.
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Question:
The sound level in St. Maria Goretti's Catholic Secondary School's cafeteria at lunch time is 63 dB. Meanwhile, the sound level in the school's chapel before class is 21 dB. How many times louder is the sound level in the cafeteria than in the chapel?
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