using System;

public class Program

{

    public static void Main()

    {

        //INPUTS:

        double r1 = 4.7;

        double r2 = 6.8;

        string soortWeerstandsvolgorde = "series";

        //OUTPUT:

        double series = r1 + r2;

        double parallel = (r1 * r2) / series;

        if(soortWeerstandsvolgorde == "series") {

            Console.WriteLine(series + " ohm");

        }

        else

        {

            Console.WriteLine(parallel + " ohm");

        }

    }

}