How many rooms can there be on the first floor of a hotel with a land of 100 square meter?

Three rooms. One hundred square meters of land can build a 90-square-meter house. According to normal standards, a standard room needs 30 square meters, so there can be three rooms on the first floor. A hotel is a place where guests are received or travelers rest or stay. In essence, the hotel's business activities are not to produce and sell tangible material products, but to provide an intangible service to guests by virtue of material facilities. What the guests finally get is the effectiveness of a service and the experience of the service process.