public static void Main()
Console.WriteLine("Enter the 1st number: ");
int num1 = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("Enter the action: ");
string act = Console.ReadLine();
Console.WriteLine("Enter the 2st number: ");
int num2 = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("Equals: "+(num1+num2));
Console.WriteLine("Equals: "+(num1-num2));
Console.WriteLine("Equals: "+(num1*num2));
Console.WriteLine("Equals: "+(num1/num2));