642.48 centimeters is equal to 252.76 inches.
This is approximately the height of a standard doorway (80 inches).
It is also slightly longer than the average adult human leg (32 inches).
It is approximately two and a half times the length of a standard computer keyboard (98 inches).
It is also slightly longer than the height of a standard office desk (30 inches).
This length is close to the width of an NFL football field (160 feet/1920 inches).