You are to make a roof for the ark, finish its walls a cubit from the top, place a door in the side of the ark, and build lower, middle, and upper decks.
KJV
A window shalt thou make to the ark, and in a cubit shalt thou finish it above; and the door of the ark shalt thou set in the side thereof; [with] lower, second, and third [stories] shalt thou make it.
ASV
A light shalt thou make to the ark, and to a cubit shalt thou finish it upward; and the door of the ark shalt thou set in the side thereof; with lower, second, and third stories shalt thou make it.