The program allows you to calculate the material for the installation of the ceiling Armstrong, for a given area and perimeter of the room.
When you specify the perimeter of the room, consider all sorts of projections, columns, recesses.
The calculation algorithm is taken from page http://www.2358112.ru/potolki_armstrong_raschet.html

If you do not agree with the calculations, write a letter to the more correct method of calculation.

Group to discuss my application https://vk.com/manatin_progs