Multiply Evens by Odds

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;



namespace ConsoleApp1
{
    class Program
    {


        static void Main()
        {
            int n = Math.Abs(int.Parse(Console.ReadLine()));
            int result = GetMultipleOfEvenAndOdds(n);
            Console.WriteLine(result);

        }

        static int GetMultipleOfEvenAndOdds(int n)
        {
            int sumEven = GetSumOfEvenDigits(n);
            int sumOdd = GetSumOfOddDigits(n);
            return sumEven * sumOdd;

        }

        static int GetSumOfEvenDigits(int n)
        {

            int sum = 0;
            while( n > 0)
            {
                int lastDigit = n % 10;
                if(lastDigit %2 != 0)
                {
                    sum = sum + lastDigit;
                }
                n /= 10;
            }
            return sum;
        }
        static int GetSumOfOddDigits(int n)
        {

            int sum = 0;
            while (n > 0)
            {
                int lastDigit = n % 10;
                if (lastDigit % 2 == 0)
                {
                    sum = sum + lastDigit;
                }
                n /= 10;
            }
            return sum;
        }



    }
    }