10. Factorial Division

using System;

namespace _8._Factorial_Division
{
    internal class Program
    {
        static void Main(string[] args)
        {
            double firstNum = double.Parse(Console.ReadLine());
            double secondNum = double.Parse(Console.ReadLine());
            double resultFirst = 0;
            double resultSecond = 0;
            double resultDivisioned = 0;

            resultFirst = GetFactoriel(firstNum, resultFirst);
            resultSecond = GetFactorielSecond(secondNum, resultSecond);

            resultDivisioned =  GetDivisioned(resultFirst, resultSecond, resultDivisioned);
            Console.WriteLine($"{resultDivisioned:F2}");
        }

        private static double GetFactoriel(double firstNum, double resultFirst)
        {
            for (double i = firstNum - 1; i >= 1; i--)
            {
                resultFirst = firstNum * i;
                firstNum = resultFirst;
            }
            return resultFirst;
        }

        private static double GetFactorielSecond(double secondNum, double resultSecond)
        {
            for (double i = secondNum - 1; i >= 1; i--)
            {
                resultSecond = secondNum * i;
                secondNum = resultSecond;
            }
            return resultSecond;
        }

        static double GetDivisioned(double resultFirst, double resultSecond, double resultDivisioned)
        {
            return resultDivisioned = resultFirst / resultSecond;
        }
    }
}