#pragma GCC optimize("O3")
#include <bits/stdc++.h>
#define ll long long
#define rep(i,n) for(ll i=0;i<(n);i++)
#define pll pair<ll,ll>
#define pii pair<int,int>
#define pq priority_queue
#define pb push_back
#define eb emplace_back
#define fi first
#define se second
#define endl '\n'
#define ios ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0);
#define lb(c,x) distance(c.begin(),lower_bound(all(c),x))
#define ub(c,x) distance(c.begin(),upper_bound(all(c),x))

using namespace std;

const ll INF=1e6+1;

int main(){
    ll t;
    cin >> t;
    while(t--){
        ll d,a,b;
        cin >> d >> a >> b;
        d--;
        a--;
        a=max(a,0LL);
        ll qa=a/d,qb=b/d,ra=a%d,rb=b%d;
        ll sa=d*(d+1)/2*qa+ra*(ra+1)/2;
        ll sb=d*(d+1)/2*qb+rb*(rb+1)/2;
        cout << sb-sa << endl;
    }
    return 0;
}