using System;

public class Program

{

    public static void Main()

    {

        Console.Write("input 1 : ");

        double num1 = double.Parse(Console.ReadLine());

        Console.Write("input 2 : ");

        double num2 = double.Parse(Console.ReadLine());

​

        Console.WriteLine("Sum = {0}",num1+num2);

        Console.WriteLine("Sub = {0}",num1-num2);

        Console.WriteLine("Multiple = {0}",num1*num2);

        Console.WriteLine("Divide = {0:f}",num1/num2);

    }

}