Neither. They are measures of different things
Kilos or kilograms are measures of mass. Miles are measures of linear distance.
The prefix kilo means 1000. So if you have a Kilo Meter you have 1000 meters. A kilo meter is bigger then just one meter
as 1 mile equals 1.6 kilomters 10 miles =16 km. So 10 miles is furthest
Yes.
3 kilo is bigger than 300 mg
56 miles 23 kilmeters 464756 inches and 1 mm