When using may boards, for example six of them, we could just say we are using six boards and write a hand like this.
And show the play as
However the boards are not always shown and just looking at the cards it is too easy to mistake the hand for a play with one board. So the number of boards is always shown with each card in division form
NOTE this gives the same result as
as the number of boards remains at six.
When there is only one board we could show this as
But usually stick to
and know that when no board is shown with the cards we are using just one board.