#include <iostream>
#include <fstream>

using namespace std;

ifstream f("multiplu.in");
ofstream g("multiplu.out");

bool c01(int x)
{
  int uc=x%10;
  while (x!=0){
    uc=x%10;
    x=x/10;
    if(uc!=1 && uc!=0)
      return false;
  }
  return true;
}

int main()
{
    int a,b;

    f>>a>>b;

    int p=a*b;

    for (int i=1;i<=max(a,b);++i)
      if (c01(i*p)){
        g<<i*p;
        break;
      }



    return 0;
}