#include <fstream>

using namespace std;
ifstream cin("multiplu.in");
ofstream cout("multiplu.out");
int main()
{
    int a,b,x,g=1,cnt,ps;
    unsigned long long s,cs;
    cin>>a>>b;
    s=a*b;
    ps=s;
    while(g==1)
    {
       cs=s;
       cnt=1;
       while(cs)
       {
          x=cs%10;
          if(x!=0&&x!=1)
             {cnt=0;
              break;}
          cs/=10;
       }
       if(cnt==1)
          g--;
       s+=ps;
    }
    cout<<s-ps;
    return 0;
}