#include <cstdio>
#include <cstring>
#define DIM 1000010

using namespace std;

int A[DIM] , G[DIM]; 
char a[DIM];
long long i, j, D, g, gg, n;
int mod(int A[], int B)
{
      int i, t = 0;
      for (i = A[0]; i > 0; i--)
              t = (t * 10 + A[i]) % B;
      return t;
}
void add(int A[], int B[])
{
      int i, t = 0;
      for (i=1; i<=A[0] || i<=B[0] || t; i++, t/=10)
              A[i] = (t += A[i] + B[i]) % 10;
      A[0] = i - 1;
}
int main()
{
	freopen ("next.in","r",stdin);
	freopen ("next.out","w",stdout);
	scanf ("%s\n%lld\n", a, &D);
	n = strlen (a);
	j = 0;
	for (i = n-1; i >= 0; i--) A[++j] = a[i]  - '0';
    A[0] = n;	
	memcpy (G, A, n+2);
	
	g = mod (G, D);
	gg = (D - g) % D; // good game
	add (A, A);
	
	j = 0;
	while ( gg ) { G [++j] = gg%10; gg/=10; }
	G[0] = j;
    add ( A, G );
	for ( i = A[0]; i >= 1; i-- ) printf ("%d",A[i]);
	return 0;
}