#include<bits/stdc++.h>
#define baza 10000000000
using namespace std;
int v[1500005],d,rest,k,x,t;
char s[1000005],buff[500];
int main()
{
    freopen("next.in","r",stdin);
    freopen("next.out","w",stdout);
    scanf("%s",&s);
    scanf("\n");
    scanf("%d",&k);
    x=strlen(s);
    for(int i=0;i<x;i++)
    {
        v[i+1]=s[i]-'0';
    }
    v[0]=x;
    rest=0;
    for(int i=1;i<=x;i++)
    {
        rest=(rest*10+v[i])%k;
    }
    rest=k-rest;
    if(rest==k) rest=0;
    if(rest)
    {
        reverse(v+1,v+x+1);
        v[1]+=rest;
        t=0;
        for(int i=1;i<=x;i++)
        {
            v[i]+=t;
            t=v[i]/10;
            v[i]%=10;
        }
        while(t)
        {
            v[++x]=t%10;
            t/=10;
        }
    }
    for(int i=v[0];i>=1;i--) printf("%d",v[i]);
    return 0;
}