为什么我的c#程序返回0

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Fahrenheit_to_Celsius_Converter
{
    class Program
    {
        static void Main(string[] args)
        {//Prompt user to enter a temperature
            Console.WriteLine("Please enter the temperature in fahrenheit you want to convert");
            //Sets variable fahr to the number entered
            string fahr = Console.ReadLine();
            //Just for testing debugging purposes displays what data is stored in fahr.
            Console.WriteLine(fahr);
            //Initializes an integer fahrint
            int fahrint;
            fahrint = int.Parse(fahr);
            //Just for testing debugging purposes displays what data is stored in fahrint.
            Console.WriteLine(fahrint);
            //Initializes an integer celcius
            decimal celcius;
            //Does the calculation that stores to a variable called celcius
            celcius = ((fahrint) - 32) * (5 / 9);
            //At this point the celcius variable print 0. It should print 5 if 41 is entered
            Console.WriteLine(celcius);
            string celciusstring;
            celciusstring = celcius.ToString();
            Console.WriteLine(celciusstring);

        }
    }
}

我已经尽可能多地注释了代码中发生的事情。该程序将华氏度存储为字符串，并将其转换为十进制小数。但是，在celcius = celcius = ((fahrint) - 32) *(5/9);处，celcius = 0而不是正确的数字。我知道我把celcius拼错了，但我不认为它影响了密码。有解决方案吗?

谢谢!