#include <fstream>
#include <cstdio>
#include <cstring>
#define nmax 10000010
using namespace std;
ifstream f("next.in");
int a[nmax],b[20];
char s[nmax];
int main()
{
freopen("next.out","w",stdout);
f.getline(s,1000001);
int i;
long long d,r=0;
f>>d;
a[0]=strlen(s);
for(i=a[0];i;i--)
a[a[0]-i+1]=s[i-1]-'0';
for(i=a[0];i;i--)
r=(r*10+a[i])%d;
if(!r) printf("%s",s);
else
{
d=d-r;
int t=0;
for(i=1;i<=a[0] || i<=b[0] || t; i++)
{
a[i]=a[i]+d%10+t;
if(a[i]>=10) {a[i]=a[i]%10; t=1;}
else t=0;
d/=10;
}
a[0]=i-1;
for(i=a[0];i;i--) printf("%d",a[i]);
}
}