Excuse me building area 220 square house, how does metope whitewash area calculate

Excuse me building area 220 square house, how does metope whitewash area calculate

The general calculation method is the building area of 220 * 3 = 660 square meters, or the use area multiplied by 3.5, which is a rough painting area. For details, you can go to the shop where you buy the paint and ask the assistant