Constructor with Arithmetic operation

using System;
using System.Collections.Generic;
using System.Text;

namespace Arith_matic_operation_using_constructor
{
   
        
    class Charles
    {
        int a, b;
        public Charles(int x,int y)
        {
            a = x;
            b = y;
        }
        public void add()
        {
            Console .WriteLine ("Addition ={0}",a+b);
        }

        public void sub()
        {
            Console.WriteLine("Subtration ={0}", a-b);
        }

        public void mul()
        {
            Console.WriteLine("Multiplication ={0}", a*b);
        }

        public void div()
        {
            Console.WriteLine("Division ={0}", a/b);
        }
    }
    class main
    {
        static void Main(string[] args)
        {
            Charles c = new Charles(10,20);
            c.add();
            c.sub();
            c.mul();
            c.div();
            
            Console.ReadLine();
        }
    }
}