#include<bits/stdc++.h>
#define ll long long
using namespace std;

int main() {
    ll n, m, ans = 0;
    cin >> n >> m;
    ll mn = min(n, m);
    ll mx = max(n, m);
    for (int i = 1; i <= mn; i++){
        ll x = mn - i + 1;
        ll y = mx - i + 1;
        ans += (x * y);
    }
    cout << ans << endl;
}