5 3
 1000 3
 777 17
 4 3
 2 2
 100 4
 10 4
 999 2
 6 4
 1 2
 17 3
 1 4
 26 8
 91 5
 1 3
 1000 2
 20 3
 9 4
 123 5
 1000 1000
 3 2
 3 3
 80 970
 1000 4
 1 1000

7
 1499
 825
 5
 3
 133
 13
 1997
 7
 1
 25
 1
 29
 113
 1
 1999
 29
 11
 153
 1001
 5
 4
 80
 1333
 1

import java.util.Scanner;
import java.util.StringTokenizer;
public class Candles {

    public static void main (String[]args) throws java.lang.Exception {
    	Scanner sc = new Scanner(System.in);
    	StringTokenizer st = new StringTokenizer (sc.nextLine());
    	int n= Integer.parseInt(st.nextToken());
    	int hours = n;
    	int x = Integer.parseInt(st.nextToken());
    	while (n%x == 0){
    		hours += n/x;
    		n= n/x;
    	}
    System.out.print(hours);
    }


}