#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
#include <iomanip>
#include <cmath>
#include <stdio.h>
#include <queue>
#include <deque>
#include <cstdio>
#include <set>
#include <map>
#include <bitset>
#include <stack>
#include <cctype>
using namespace std;
int main() {
    int q;
    cin >> q;
    for (int i = 0; i < q; i++) {
        long long d, a, b;
        cin >> d >> a >> b;
        if (a == 0 && b == 0) {
            cout << "0" << endl;
            continue;
        }
        long long l, r;
        a--;
        l = a / (d - 1) * ((d - 1) * d / 2);
        long long m = a % (d - 1);
        l += m * (m + 1) / 2;
        r = b / (d - 1) * ((d - 1) * d / 2);
        m = b % (d - 1);
        r += m * (m + 1) / 2;
        cout << r - l << endl;
    }
}