using System;

public class Program

{

    private static double Addition(double num1, double num2)

    {

        double sum = num1 + num2;

        return sum;

    }

    private static double Subtraction(double num1, double num2)

    {

        double answer = num1 - num2;

        return answer;

    }

    private static double Multiplication(double num1, double num2)

    {

        double product = num1 * num2;

        return product;

    }

    private static double Division(double num1, double num2)

    {

        double quotient = num1 / num2;

        return quotient;

    }

    public static void Main()

    {

        Console.Write("Enter the first number: ");

        double num1 = Convert.ToDouble(Console.ReadLine());

        Console.Write("Enter the second number: ");

        double num2 = Convert.ToDouble(Console.ReadLine());

        Console.Write($"Results:\nAddition: {Addition(num1, num2)}\nSubtraction: {Subtraction(num1, num2)}\nMultiplication: {Multiplication(num1, num2)}\nDivision: {Division(num1, num2)}");

    }

}