465 milligrams to kilograms = 0.000465
Micrograms -> Milligrams -> Centigrams -> Decigrams -> Grams ->Decagrams -> Hectograms -> Kilograms
465.0 - The decimal is after the 5.
Milligrams - 6 places after that is kilograms
Since you're converting to a higher SI Unit, the decimal moves to the left.
If you were converting it to a lower SI Unit, the decimal moves to the right.