#include <bits/stdc++.h>
using namespace std;
#define int long long
void solve()
{
    int a, b, c, d;
    cin >> a >> b >> c >> d;
    int t = min(b, c);
    t >>= 1;
    if (a < 4)
    {
        cout << 0 << endl;
        return;
    }
    else
    {
        if (t == 0)
        {
            cout << 4 << endl;
        }
        else if (d <= (t << 1) - 1)
        {
            cout << 4 + d + 2 * (d + 1) << endl;
        }
        else if (d >= t * t)
        {
            cout << 4 + t * 4 + t * t << endl;
        }
        else
        {
            int ans = 0;
            for (int i = t; i >= 1; i--)
            {
                if (d >= i * (2 * t - i))
                {
                    ans = i * (2 * t - i) + 4 * t;
                    // cout << i << endl;
                    break;
                }
            }
            cout << ans + 4 << endl;
        }
    }
}

signed main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    int T;
    cin >> T;
    while (T--)
        solve();
    return 0;
}