Convert from military pace [double time] to verge

Unit Definition (military pace [double time])
The length of a single step in marching (taken to be 30 inches for quick time or 36 inches for double time).

Unit Definition (verge)
The verge is an old name for the yard, taken from the Latin word virga for a twig or stick. In modern French, verge is the customary word for the English yard.