18L/ barrel latex paint: 1. 5 barrels (one and a half barrels), white, twice survival, rolling brush operation.

Wall paint = latex paint. If you want to ask how much putty there is on the wall:

303 putty powder:15th generation.

303 gypsum powder: 5-7 generations.

(it depends on whether there is a gypsum board ceiling and the flatness of the wall foundation. And calculate the actual situation. )