using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Result ft/h: " + BaseToDerived(1, 0, 0.3048, 3600, 0));

        Console.WriteLine("Result ft/min: " + BaseToDerived(1, 0, 0.3048, 60, 0));

    }

    private static double DerivedToBase(double derived, double a, double b, double c, double d)

    {

        return (a + b * derived) / (c + d * derived);

    }

    private static double BaseToDerived(double @base, double a, double b, double c, double d)

    {

        return (a - c * @base) / (d * @base - b);

    }

}