Convert from fathom to metric mile [high school]

Unit Definition (fathom)
a linear unit of measurement (equal to 6 feet) for water depth.

Unit Definition (metric mile [high school])
A metric mile is a distance of 1,500 meters. This distance is used when it is desirable to approximate the statute mile, yet also desirable to use a convenient round number in SI or metric units. A statute mile is actually 1,609.347 meters.