using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    static int[][] NArr(long n) => Enumerable.Repeat(0, (int)n).Select(_ => NList).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var t = NN;
        var ans = new long[t];
        for (var u = 0; u < t; ++u)
        {
            var c = NList;
            var (d, a, b) = (c[0], c[1], c[2]);
            ans[u] = Sum(d, b) - Sum(d, a - 1);
        }
        WriteLine(string.Join("\n", ans));
    }
    static long Sum(long d, long a)
    {
        var r = a % (d - 1);
        return d * (d - 1) / 2 * (a / (d - 1)) + r * (r + 1) / 2;
    }
}