Circumference of the Earth
It is about 280 miles or a bit over 400 kilometers from Memphis to St. Louis.
It is about 3000 miles from New York to Los Angeles, or about 10 times the Memphis to St. Louis distance.
It is about 25000 miles around the Earth, or about 8 times the New York to Los Angeles distance, and a little less than 100 times the Memphis to St. Louis distance.