Convert from quarter [print] to fathom [ancient]

Unit Definition (quarter [print])
The quarter is a unit of distance equal to 0.25 millimeter. See Q and point.

Unit Definition (fathom [ancient])
A fathom is a unit of measure equal to 2 yards or 6 feet, or 1.8288 metres. The name of the unit derives from the Old English word fæthm meaning 'outstretched arms' which was the original definition of the unit's measure.