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

void solve()
{
    ll n, m;
    cin >> n >> m;
    ll ans = 0;
    for(int i = 1; i <= min(n, m); i++){
        ll x = n - i + 1;
        ll y = m - i + 1;
        ans += (x *y);
    }
    cout<<ans<<endl;
}
int main()
{
    int tc = 1, cs = 1;
    // cin >> tc;
    while (tc--)
    {
        // cout<<"Case "<<cs<<": ";
        solve();
    }
    return 0;
}