3.084×1019 km3.084 \times 10^{19} \mathrm{~km}3.084×1019 km
3.84×109 km3.84 \times 10^{9} \mathrm{~km}3.84×109 km
3.084×109 m3.084 \times 10^{9} \mathrm{~m}3.084×109 m