Bluebulb Projects' The Measure of Things presents:
42,000 is about twenty times the number of Steps in the Sears Tower.
In other words, it's 19.910 times the count of Steps in the Sears Tower, and the count of Steps in the Sears Tower is 0.05023 times that amount.
(a.k.a. Willis Tower) (Chicago, Illinois) (steps per stairwell)