10 cm by ...
That's 10 cm x 10 cm x 10 cm or 1000 cm3.
Or, 1 dm x 1 dm x 1 dm or 1 dm3 --
1000 cm3 is 1 dm3
One thousand centimeter cubes is the same volume as one decimeter cube.
You might not have know decimeter cubed measures volume. Most people think volume or capacity is measured ...
by the liter ...
and they are right.
The liter, L or l, measures exactly the same as a decimeter cubed. Why everyone knows about their famous relations.