#include <iostream>
#include <string>
#include <algorithm>
#include <set>
using namespace std;
int
main(int argc, char **argv)
{
int ans = 0;
set<int> set_ans;
string s = "123456789";
do
{
for (unsigned int i = 1; i < 8; i++)
{
for (unsigned int j = i+1; j < 9; j++)
{
int num[3];
int i_num = 0;
memset(num, 0, 3*sizeof(int));
for (unsigned int k = 0; k < s.size(); k++)
{
if (k == i || k == j)
{
i_num++;
}
num[i_num] *= 10;
num[i_num] += s.at(k)-'0';
}
if (num[0]*num[1] == num[2])
{
set_ans.insert(num[2]);
}
}
}
} while (next_permutation(s.begin(), s.end()));
for (set<int>::iterator it = set_ans.begin(), e = set_ans.end(); it != e; it++)
{
ans += *it;
}
cout << ans << endl;
return 0;
}