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.io.*;


public class Solution {
    public static void main(String[] args) throws IOException {
        BufferedReader bf=new BufferedReader(new InputStreamReader(System.in));
        String[] str= bf.readLine().split(" ");
        double a= Integer.parseInt(str[0]);
        double b= Integer.parseInt(str[1]);

        double ab=a/b;
        int ab1= (int) ab;
        double ab11=ab-ab1;


        double aaa=ab/b;
        int aaa1= (int) aaa;
        double aaa11=aaa-aaa1;


int z= (int) (ab11+aaa11);
        int value = (int) (a+ab+aaa+z);

        System.out.print(value);

    }
}