#include <iostream>
using namespace std;

void main()
{
	int Sum = 0;
	for (int i = 10; i < 1001;i++)
	{
		int Temp1 = 1;
		int Temp2 = i;
		while (Temp2>0)
		{
			Temp1 *= (Temp2 % 10);
			Temp2 /= 10;
		}
		Sum += Temp1;
	}
	cout << Sum << endl;
}