Bluebulb Projects' The Measure of Things presents:
7,800 is about three-and-a-half times the number of Steps in the Sears Tower.
In other words, it's 3.698 times the count of Steps in the Sears Tower, and the count of Steps in the Sears Tower is 0.2704 times that amount.
(a.k.a. Willis Tower) (Chicago, Illinois) (steps per stairwell)