Question

Question #08bf7

Answer 1

`kg` and `m^3` respectively.

Explanation:

The kilogram or kilogramme (SI unit symbol: kg) is the base unit of mass in the International System of Units (SI) (the Metric system) and is defined as being equal to the mass of the International Prototype of the Kilogram (IPK, also known as "Le Grand K" or "Big K").
( wikipedia )

The meter , and thus the cubic meter `m^3` is defined by physical constants, as opposed to the kilogram, which is defined as being equal to a piece of platinum-iridium alloy just lying somewhere.

Both the kilogram and the meter (sometimes spelled metre) may be prefixed to get larger or smaller units.
E.g. millimeter `mm=1/1000m` or kilometer `km=1000m`

Since the 'kilo' in kilogram is already a prefix, the subdivsion is:
`1kg=1000g=1000000mg`