Is there a way to expand matrix with submatrices inside to single regular matrix?

[yoohooos]

I have this k_1 matrix

is there a way to expand this matrix to 6 by 6?

[AlanStevens · Accepted solution]

Like this perhaps:

This was done in MC15, but I expect it will work in Prime as well.

Alan

[yoohooos]

Thank you very much! It worked!