#include <bits/stdc++.h>
using namespace std;
int main()
 {
    int a,b;
    cin >> a >> b;

    int x = min(a, b);
    long long c= 0;

    for(int i=1; i<=x; ++i){
        c+= (a-i+1)*(b-i+1);
    }
    cout <<c<< endl;
}