#include<fstream.h>
#include<iostream.h>
int main()
{
	long a,b,m=1,k,z,y;

fstream f1("multiplu.in", ios::in); 
fstream f2("multiplu.out", ios::out);
f1>>a>>b;
k=a*b;
while(a!=b)
{	if(a>b) a=a-b; 
	else b=b-a;
}
if(a==0) a=1;
k=k/a; 
a=k;
while(m!=k)
{	b=k; 
	y=0;
	while(b!=0)
	{	z=b%10; 
		b=b/10;
		if((z!=0)&&(z!=1)) y++; 
	}
	if(y==0) m=k; 
	else k=k+a;
}
f2<<m;
f1.close(); 
f2.close();
return 0;
}