Convert from military pace to douzieme [watchmaking]

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

Unit Definition (douzieme [watchmaking])
The douzieme is a traditional unit of distance used in watchmaking. The word is French for "twelfth," and a douzième is equal to 1/12 Swiss ligne. This is about 188 micrometers (microns) or 7.4 mils.