public static void Main()
Console.WriteLine("Luis Armando Perez Puga");
Console.WriteLine("Enter the first number");
int n1=Convert.ToInt32(Console.ReadLine());
Console.WriteLine("Enter the second number");
int n2=Convert.ToInt32(Console.ReadLine());
Console.WriteLine("{0}+{1}={2}",n1,n2,s);
Console.WriteLine("{0}-{1}={2}",n1,n2,r);
Console.WriteLine("{0}*{1}={2}",n1,n2,m);
Console.WriteLine("{0}/{1}={2}",n1,n2,d);