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A roller coaster can carry at most 18 people in one trip around its tracks. The total number of people who can ride the roller coaster in one day is p *t, where t is the number of trips in one day, and p is the number of people the roller coaster can carry on each trip.
One day the roller coaster made 55 trips around the tracks, and every seat was filled for every trip. How many people rode the roller coaster that day?
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what is 990