42 miles equals 67,592,448,000,000 nanometers.
Convert 42 miles into meters, kilometers, decimeters, centimeters, milimeters, micrometers, picometers, inches, feet, yards, hands, lightyears, astronomical units, parsecs, etc...
Convert 67592448000000 nanometers into meters, kilometers, decimeters, centimeters, milimeters, micrometers, picometers, inches, feet, yards, hands, lightyears, astronomical units, parsecs, etc...