public static void Main()
Console.Write("Прожекция- ");
string p = Console.ReadLine();
Console.Write("редове- ");
int r = int.Parse(Console.ReadLine());
Console.Write("колони- ");
int k = int.Parse(Console.ReadLine());
Console.WriteLine("{0:0.00} leva",r*k*12);
Console.WriteLine("{0:0.00} leva",r*k*7.5);
Console.WriteLine("{0:0.00} leva",r*k*5);