How many milligrams make one kilogram?

Change the following quantities into the required units:

$35,000 \mathrm{cm}$ into $\mathrm{m}$

Change the following quantities into the required units:

$15,000 \mathrm{g}$ into $\mathrm{kg}$

Change the following quantities into the required units:

$28,000 \mathrm{m}$ into $\mathrm{km}$

Change the following quantities into the required units:

$7000 \mathrm{mL}$ into $\mathrm{L}$

Change the following quantities into the required units:

$56,000 \mathrm{mg}$ into $\mathrm{g}$