A cubic metre is a measure of volume and a square metre is a measure of area. The question is meaningless.

1 square meters equals to how many cubic meters?

Cannot be derived until depth dimension is known.

1 meter equals how many cubic meters?

It is impossible to convert a meter to a cubic meter, due to the fact that a meter is a unit of length, and a cubic meter is a unit of volume. Here is what I mean:Meters would be used to measure something like your height, or the length of a String.A cubic meter would be used to measure the amount of a fluid in a certain space.