// we have defined the necessary header files here for this problem.
// If additional header files are needed in your program, please import here.

int main()
{  
  // please define the C++ input here. For example: int a,b; cin>>a>>b;;  
  // please finish the function body here.  
  // please define the C++ output here. For example:cout<<____<<endl; 
   int M,N;
   cin>>M>>N;
    int sum = 0;
     int t = 1;
    int res = M;
    while(N--)
    {
        sum = sum+res;
        t = t*10;
        res = M*t+res;
        //cout<<res<<endl;
       
    }
    cout<<sum<<endl;
  return 0;
}