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#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("multiplu.in");
ofstream fout("multiplu.out");
int good(int x)
{
while(x>0)
{
if(x%10!=1 && x%10!=0)
{
return false;
}
x=x/10;
}
return true;
}
int main()
{
int a,b,m;
fin>>a>>b;
m=a*b;
for(int i=1;i<=2000000/m;i++)
{
if(good(i*m))
{
fout<<i*m;
break;
}
}
return 0;
}