It is 4674 km rounded
It depends on what measure it is that you are trying to round.
Round off to the nearest cent, means round off to the nearest hundredths or round off to two decimal.
Round this number to the nearest hundredth 0.3636 ? Round this number to the nearest hundredth 0.3636 ?
It is already rounded to the nearest thousandth.
Round 1.636363636 to the nearest hundredth is 1.64.