#include <stdio.h>
int main()
{
	int a = 0;
	int n = 0;
	int sum = 0;
	int k = 0;
	scanf("%d%d", &a, &n);
	for (int i = 1; i <= n; i++)
	{
		k = 10 * k + a;//k表示第i项的值
		sum = sum + k;
	}
	printf("%d", sum);
	return 0;
}