#include <bits/stdc++.h>

using namespace std;

using ll = long long;

constexpr char newl = '\n';

ll calc(ll n, ll d) {
    if (n <= 0) return 0;
    ll ans = (d - 1) * d / 2 * (n / (d - 1));
    ll rest = n % (d - 1);
    ans += (rest + 1) * rest / 2;
    return ans;
}

int main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);

    int t;
    cin >> t;
    for (int loop = 0; loop < t; loop++) {
        ll d, a, b;
        cin >> d >> a >> b;
        cout << calc(b, d) - calc(a - 1, d) << newl;
    }

    return 0;
}