What is the usable area of 80 square meters high-rise building?

Under normal circumstances, the interior construction area of high-rise residential buildings is about 0.8% of the purchase construction area, while the net use area is about 0.65% of the purchase construction area. That is to say, buy a building with a building area of 80m? Living area is about 5 1m? . It is equivalent to a medium-sized' two rooms, one living room, one kitchen and one toilet'.

The question is answered, but I still hope that the landlord will be serious in the future and the respondents will be tired. What do you mean by "tall building"?