Thematic Bible: Directions for building of

Make for yourself an ark of gopher wood with rooms in it, and make it safe from the water inside and out. And this is the way you are to make it: it is to be three hundred cubits long, fifty cubits wide, and thirty cubits high. You are to put a window in the ark, a cubit from the roof, and a door in the side of it, and you are to make it with a lower and second and third floors.