#include<cstdio>

int cmmdc(int a,int b)
{
	int r;
	while (b)
	{
		r=a%b;
		a=b;
		b=r;
	}
	return a;
}

bool verif(int x)
{
	while (x)
	{
		if (x%10>1)
			return false;
		x/=10;
	}
	return true;
}

int main()
{
	freopen("multiplu.in","r",stdin);
	freopen("multiplu.out","w",stdout);
	int a,b;
	scanf("%d%d",&a,&b);
	int cmmmc=(a*b)/cmmdc(a,b);
	for (int i=1;i<=300000000;i++)
	{
		int x=cmmmc*i;
		if (verif(x))
		{
			printf("%d\n",x);
			break;
		}
	}
	return 0;
}