How to design a five-story hotel with an area of160m2?

According to the standard room, if each room in the bathroom is about 18m_ (including the wall 3mX6m), then 160m_ can be divided into 8.9 rooms. But except the area of corridor, stairs and elevator, only seven standard rooms can be made on each floor, so there are three standard rooms on one side of the stairs and four standard rooms on the opposite side of the stairs, with an area of 65,433 * * 7 standard rooms. Middle corridor18m _ (width of four standard rooms X3m/ room = 12mX corridor 1.5m width = 18m_), and staircase elevator * * * occupies 16m_. The external dimensions of the building should be: length 13.4mX, width 12m. This is probably the layout.