Newb trying to learn C# / stuck

[Gomo]

Hello there,

I've just started getting into C# and of course, the first thing I wanted to make was a calculator.. aaaaand I'm stuck..

This is what I have:

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

namespace Calculator
{
    class Program
    {
        static void Main(string[] args)
        {
        Start:
            string nr1;
            float nr2;
            float nr3;

            Console.Write("Enter a calculation operation symbol which you'd like to use: ");
            nr1 = Console.ReadLine();
            Console.Write("Enter the first number:  ");
            nr2 = Console.ReadLine();
            Console.Write("Enter the second number:  ");
            nr3 = Console.ReadLine();

            if (nr1 == "+")
            {
                goto Addition;
            }
            else if (nr1 == "-")
            {
                goto Subtraction;
            }
            else if (nr1 == "/")
            {
                goto Dividing;
            }
            else if (nr1 == "*")
            {
                goto Multiplying;
            }
            else Console.Write("Incorrect Entry, try again!");
            goto Start;
        Addition:
            Console.Clear();
            Console.WriteLine("The result is: " + (nr2 + nr3));
            Console.ReadKey();
            Console.Clear();
            goto Start;
        Subtraction:
            Console.Clear();
            Console.WriteLine("The result is: " + (nr2 - nr3));
            Console.ReadKey();
            Console.Clear();
            goto Start;
        Dividing:
            Console.Clear();
            Console.WriteLine("The result is: " + (nr2 * nr3));
            Console.ReadKey();
            Console.Clear();
            goto Start;
        Multiplying:
            Console.Clear();
            Console.WriteLine("The result is: " + (nr2 / nr3));
            Console.ReadKey();
            Console.Clear();

            goto Start;
        }
    }
}

Addition and Subtraction seem to work, but multiplaying and dividing don't.

Your help would be appreciated!