using System;

public class Program

{

    public static void Main()

    {

        var w = new Whatever(30.0f);

        var y = w * 2;

        Console.WriteLine("Res: " + y.x);

    }

    public  class Whatever {

       public float x;

        public Whatever(float x) {

            this.x = x;

        }

​

        public static Whatever operator *(Whatever m1, int c)

        { 

            Whatever newWhatever = new Whatever(m1.x);

            newWhatever.x = m1.x * (float) c;

​

           return newWhatever;

        }

    }

}

​