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

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