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

#include <bits/stdc++.h>
int main() {
  int a, b, r, c, d, e, f, g, r1, c1, d1, e1, f1, g1, p;
  scanf("%d%d", &a, &b);
  r = a / b;
  r1 = a % b;
  c = r / b;
  c1 = r % b;
  d = c / b;
  d1 = c % b;
  e = d / b;
  e1 = d % b;
  f = e / b;
  f1 = e % b;
  g = f / b;
  g1 = f % b;
  p = (r1 + c1 + d1 + e1 + f1 + g1) / b;
  printf("%d", a + r + c + d + e + f + g + p);
  return 0;
}
