//Problema multiplu
# include <fstream.h>
	ifstream fin ("multiplu.in");
	ofstream fout ("multiplu.out");
	long a, b, m, prod;
	int nr, ok, k=1, c;
int main ()
{
	fin >> a >> b;
	m=a*b;
	prod=m;
	while (!ok)
	{
		c=0;
		prod=m*k;
		while (prod)
		{
			if (prod%10!=1 && prod%10!=0)
			{
				c++;
				break;
			}
			prod/=10;
		}
		if (!c)
		{
			m=m*k;
			ok++;
		}
		else
			k++;
	}
	fout << m << '\n';
	fout.close ();
	return 0;
}