Bluebulb Projects' The Measure of Things presents:
39,000 is about 300 times the number of Union Stations in the United States.
In other words, it's 289 times the count of Union Stations in the United States, and the count of Union Stations in the United States is 0.00346 times that amount.
(a.k.a. Union Terminal; a.k.a. Joint Station; a.k.a. Union Depot) (2016 figures)