Calculator in console by raxe modz

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace My_first_project
{
    class Program
    {
        static void Main(string[] args)
        {
            calculator();

        }

        private static void calculator()
        {
            userStart:
            Console.ForegroundColor = ConsoleColor.Green;
            Console.Write("User : ");
            String user = Console.ReadLine();
            if (user == "raxemodz")
            {
                passwordStart:
                Console.Write("Password : ");
                String password = Console.ReadLine();
                if (password == "hatemyself")
                {
                    mainStart:
                    Console.Clear();
                    Console.WriteLine("Hello, " + user +  " and welcome to my first calculator programmed in C#.");
                    Console.WriteLine("----------------------------------------------------------------------------");
                    Console.WriteLine("1. Division\n2. Multiplication\n3. Addition\n4. Substraction");
                    Console.Write("Choise : ");
                    String choise = Console.ReadLine();


                    if (choise == "1")
                    {
                        divisionStart:
                        double firstNumber;
                        double secondNumbers;

                        Console.Clear();
                        Console.WriteLine("-----------------------------");
                        Console.Write("First number : ");
                        firstNumber = Convert.ToDouble(Console.ReadLine());
                        Console.Write("Second numbers : ");
                        secondNumbers = Convert.ToDouble(Console.ReadLine());
                        Console.WriteLine("Result : " + firstNumber / secondNumbers);
                        Console.WriteLine("-----------------------------");
                        Console.ReadKey();
                        Console.ReadLine();
                        goto divisionStart;
                    }
                    else if (choise == "2")
                    {
                        multiplicationStart:
                        int firstNumber;
                        int secondNumbers;

                        Console.Clear();
                        Console.WriteLine("-----------------------------");
                        Console.Write("First number : ");
                        firstNumber = Convert.ToInt32(Console.ReadLine());
                        Console.Write("Second numbers : ");
                        secondNumbers = Convert.ToInt32(Console.ReadLine());
                        Console.WriteLine("Result : " + firstNumber * secondNumbers);
                        Console.WriteLine("-----------------------------");
                        Console.ReadKey();
                        Console.ReadLine();
                        goto multiplicationStart;
                    }
                    else if (choise == "3")
                    {
                        additionStart:
                        int firstNumber;
                        int secondNumber;
                        Console.Clear();
                        Console.WriteLine("-----------------------------");
                        Console.Write("First number : ");
                        firstNumber = Convert.ToInt32(Console.ReadLine());
                        Console.Write("Second number : ");
                        secondNumber = Convert.ToInt32(Console.ReadLine());
                        Console.WriteLine("Result : " + (firstNumber + secondNumber));
                        Console.WriteLine("-----------------------------");
                        Console.ReadKey();
                        Console.ReadLine();
                        goto additionStart;
                    }
                    else if (choise == "4")
                    {
                       substractionStart:
                        int firstNumber;
                        int secondNumber;
                        Console.Clear();
                        Console.WriteLine("-----------------------------");
                        Console.Write("First number : ");
                        firstNumber = Convert.ToInt32(Console.ReadLine());
                        Console.Write("Second number : ");
                        secondNumber = Convert.ToInt32(Console.ReadLine());
                        Console.WriteLine("Result : " + (firstNumber - secondNumber));
                        Console.WriteLine("-----------------------------");
                        Console.ReadKey();
                        Console.ReadLine();
                        goto substractionStart;
                    }
                    else
                    {
                        Console.WriteLine("Wrong value please try again :/");
                        Console.ReadKey();
                        Console.ReadLine();
                        goto mainStart;
                    }
                }
                else
                {
                    Console.Clear();
                    Console.WriteLine("You enter the wrong password please try again :/");
                    Console.ReadKey();
                    Console.ReadLine();
                    goto passwordStart;
                }
            }
            else
            {
                Console.Clear();
                Console.WriteLine("You enter the wrong user please try again :/");
                Console.ReadKey();
                Console.ReadLine();
                goto userStart;
            }
            Console.ReadLine();
        }
    }
}