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The basic formula is 1 cubic metre = 1 metre x 1 metre x 1 metre.
The question does not make sense.
One part of a one-cubic metre shape makes a cubic metre.
Half of a two-cubic metre shape makes a cubic metre, and so on.
1.000 cubic metre = 1,000 litres
0.860 cubic metre = 860 litres
A container one metre high, one metre long, and one metre wide holds one cubic metre of solids.
It is 1 cubic metre.