Bluebulb Projects' The Measure of Things presents:
1,300 is about three-fifths the number of Steps in the Sears Tower.
In other words, it's 0.6164 times the count of Steps in the Sears Tower, and the count of Steps in the Sears Tower is 1.622 times that amount.
(a.k.a. Willis Tower) (Chicago, Illinois) (steps per stairwell)