How do you determine the precise painting service cost for a Children's Room in Lugano, considering including ceilings, 2 doors, and 1 windows, with dimensions of 3m x 3m?

Determining the precise painting service cost for a Children's Room in Lugano, considering including ceilings, 2 doors, and 1 windows, with dimensions of 3m x 3m, costs CHF 181.00.

*) 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.