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

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