#include <bits/stdc++.h>

using namespace std;
using ll = long long;

ll f(ll x, ll d){
    if (x <= 0) return 0;
    ll q = x/(d-1), r = x % (d-1), s = d*(d-1)/2;
    return q*s + r*(r+1)/2;
}

void solve(){
    ll d, a, b;
    cin >> d >> a >> b;
    cout << f(b, d)-f(a-1, d) << endl;
}

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

    int T;
    cin >> T;
    while(T){
        T--;
        solve();
    }

    return 0;
}