#include<bits/stdc++.h>
#define int long long
using namespace std;
signed main(){
  int Q;
  cin>>Q;
  while(Q--){
    int d,A,B;
    cin>>d>>A>>B;
    if(d==2){
      cout<<B-A+(A!=0)<<endl;
      continue;
    }
    if(A==0){
      A++;
    }
    d--;
    cout<<((A-1)/d==B/d?(A%d+B%d)*(B%d-A%d+1)/2:(B/d-(A+d-1)/d)*(d*(d+1)/2)+(A%d?(A%d+d)*(d-A%d+1)/2:d)+(B%d?(B%d*(B%d+1)/2):0))<<endl;
  }
}