#include<iostream>
#include<cstring>
#include<algorithm>

using namespace std;

char change(int x) {
    return x + '0';
}

int main() {
	
	int a, b;
	cin >> a >> b;
	
	int sum = 0;
	string s;
	for (int i = 0; i < b; i ++) {
		s += change(a);
		sum += atoi(s.c_str());
	}
	
	cout << sum << endl;
	
	return 0;
}