public static void Main()
Console.WriteLine("nomre 1 :");
double d1 = Convert.ToDouble(Console.ReadLine());
Console.WriteLine("vahed 1 :");
double v1 = Convert.ToDouble(Console.ReadLine());
Console.WriteLine("nomre 2 :");
double d2 = Convert.ToDouble(Console.ReadLine());
Console.WriteLine("vahed 2 :");
double v2 = Convert.ToDouble(Console.ReadLine());
Console.WriteLine("nomre 3 :");
double d3 = Convert.ToDouble(Console.ReadLine());
Console.WriteLine("vahed 3 :");
double v3 = Convert.ToDouble(Console.ReadLine());
double hasel = (d1+d2+d3)/(v1+v2+v3);
Console.WriteLine("hasel: {0}",hasel);