using System;

public class Solution

{

    public static void Main()

    {

        Console.WriteLine(specialMultiplication(123));

    }

    public static int specialMultiplication(int number){

        int sum = 0;

        while (number != 0) {

            sum += number % 10; // dimodulo 10 karna 

            number /= 10;

        }

        return sum;

    }

}