using System;
public class Program
{
public static void Main()
// DECLARACION DE VARIABLE
double decimal1 = 2;
double decimal2 = 7.8;
double decimal3 = 9.0;
//proceso
decimal1 = decimal2 + decimal3;
decimal2 = decimal1 + decimal3;
// SALIDA
Console.WriteLine("DECIMAL1;" + decimal1);
Console.WriteLine("DECIMAL2;" + DECIMAL2);
Console.ReadKey();
}