Skysaver: Emergency Evacuation from High-Rise Buildings Posted by pr337h4m on Sunday April 23, 2023 @12:49AM from the skysaver.com dept. https://skysaver.com/ ( 3 comments | on HN )
3 millimeter cable on 200x100 millimeter reel.
(math.pi x 200 x 100 / 3) /1000 ==> 20.94 meters.
And one floor being 4 meters the final answer is:
FIVE FLOORS