Converting int to double to output with decimals

  public static void Main (string[] args) 
    {
        double celsius = 0;
        int fahr;
        
        do
        {
            /*
            +---------------------------+
            | Here i input the integer! |
            +---------------------------+
            */
            Console.WriteLine("Write temp in fahrenheit: ");
            fahr = int.Parse(Console.ReadLine());

            celsius = FahrToCels(fahr);

            Console.WriteLine("Your value in Celsius: " + celsius);
            if (celsius < 82)
            {
                Console.WriteLine("Too Cold!");
            }
            else if (celsius > 87)
            {
                Console.WriteLine("Too Hot!");
            }
        } while (celsius < 82 || celsius > 87);
        Console.WriteLine("Temp is ok! Enjoy!");
                
                /*
            +-------------------------------------+
            | Here i want to output with decimals |
            +-------------------------------------+
            */
        Console.WriteLine("Fahrenheit: " + fahr);
        Console.WriteLine("Celsius: " + celsius + "\n");
    }

    /*
    +--------------------------------------------------------------------------------+
    | Here i want to convert integer to double to output with decimals in code above |
    +--------------------------------------------------------------------------------+
    */
    public static double FahrToCels(int fahr)
    {
        double cel = (fahr - 32) * 5 / 9;
        return cel;
    }