using System;

using System.Collections.Generic;

​

public class ValueContainer

{

    public double Value{get;set;}

    public List<Mention> Mentions{get;set;}

}

​

public class Mention

{

    public double Value{get;set;}

    public MentionType Type{get;set;}

    public Mention(double value, MentionType type)

    {

        Value = value;

        Type = type;

    }

    public enum MentionType

    {

        Normal,

        Reversed

    }

    public static Mention operator * (double value, Mention m)

        => new Mention(m.Value * value,m.Type);

    public static Mention operator * (Mention m, double value)

        => new Mention(m.Value * value,m.Type);

    public static ValueContainer operator * (Mention m1, Mention m2)

        => new ValueContainer

        {

            Value = (m1.Type,m2.Type) switch 

            {

                (MentionType.Normal, MentionType.Normal) => m1.Value * m2.Value,

                (MentionType.Normal, MentionType.Reversed) => m1.Value / m2.Value,

                (MentionType.Reversed, MentionType.Normal) => m2.Value / m1.Value,

                (MentionType.Reversed, MentionType.Reversed) => 1 / (m1.Value * m2.Value),

                (_,_) => throw new ArgumentException("What a retard, lol")

            },

            Mentions = new List<Mention>()

            {

                new Mention(1,m1.Type),

                new Mention(1,m2.Type)

            }

        };

}

​

public class Kg : Mention

{

    public Kg(double value, MentionType type = MentionType.Normal) : base(value,type)

    {

    }

}

​

public class Meter : Mention

{

    public Meter(double value, MentionType type = MentionType.Normal) : base(value,type)

    {

    }

}

​

public class Program

{

    public static void Main()

    {

        var dicks = new Kg(10); // 10 killograms of dicks

        var manyDicks = 100 * dicks;

        Console.WriteLine(string.Format("{0} kg of dicks", manyDicks.Value));

    }

}