#include <iostream>

#include <iostream>
using namespace std;

int main() {
long long n, m;
m;
long long total = 0;
int max_k = min(n, m);
for (int k = 1; k <= max_k; ++k) {
long long count = (n - k + 1) * (m - k + 1);
total += count;
}
cout << total << endl;
return 0;
}