How much paint is required to paint walls and excluding ceilings of a Children's Room covering dimensions 5m by 8m, considering there are 2 windows and 1 doors and location is in Bern?

The cost of painting a Children's Room with dimensions 5m by 8m, with 2 windows and 1 doors, located in Bern, is CHF 395.00.

*) The calculations are approximate, based on a room height of 2.4m, and include one coat of paint. The price covers only the labor, excluding any services or materials.