How many yards in a yukata?

None. There are no yards in a cubic yard, because a yard is a linear unit of distance, whereas a cubic yard is a spacial unit of volume. A cubic yard is the volume occupied by a cube that measures...

800 ? !

It's not possible to answer this question as it appears. A square yard is a unit of area, while a yard is a unit of length or distance. If you can rephrase your question more clearly, we can help you.

it doesn't quite work like that. A SQUARE yard means that it is a square, but each side measures a yard.