#include <bits/stdc++.h>
using namespace std;
int main(){
  int T;
  cin >> T;
  for (int i = 0; i < T; i++){
    long long d, A, B;
    cin >> d >> A >> B;
    if (B == 0){
      cout << 0 << endl;
    } else {
      if (A == 0){
        A = 1;
      }
      A--;
      long long sumB = (B / (d - 1)) * (d - 1) * d / 2 + (B % (d - 1)) * (B % (d - 1) + 1) / 2;
      long long sumA = (A / (d - 1)) * (d - 1) * d / 2 + (A % (d - 1)) * (A % (d - 1) + 1) / 2;
      cout << sumB - sumA << endl;
    }
  }
}