In 2008, the United States consumed 20,680,000 barrels of oil per day. A barrel of oil is 42 U. S. gallons. In 2008, there were about 305,000,000 people in the United States. Estimate how many gallons each person in the United States consumed each day in 2008 by rounding down all three numbers. Round your answer to two decimal places. (Round 20,680,000 barrels to 20,000,000 barrels, 305,000,000 people to 300,000,000 people, and 42 gallons to 40 gallons.)