#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); i++)
using namespace std;
typedef long long ll;

int main(){
    cin.tie(0);
    ios::sync_with_stdio(0);

    // r(n, d) = 1 + (n - 1 mod d - 1)

    auto r = [](ll X, ll d) {
        ll ans = 0;
        for(ll x = 0; x <= X; x++) ans += 1 + (x - 1) % (d - 1);
        return ans;
    };

    auto f = [](ll X, ll d) {
        ll ans = 0;
        ans += X;
        ans += ((X - 1) / (d - 1)) * ((d - 2) * (d - 1) / 2);
        ll r = (X - 1) % (d - 1);
        ans += r * (r + 1) / 2;
        return ans;
    };

    int T; cin >> T;
    rep(_,T) {
        ll d,A,B; cin >> d >> A >> B;
        cout << f(B, d) - f(A - 1, d) << "\n";
    }
    return 0;
}