To convert to [[kilo]] from a base unit you must divide by 1000.
: 23000m = (23000/1000)km = 23km
: 8200m 8200A = (8200/1000)km kA = 8.2km2kA: 670m 670V = (670/1000)km kV = 0.67km67kV: 32m 32N = (32/1000)km kN = 0.032km032kN: 2m 2J = (2/1000)km kJ = 0.002km002kJ