#include<iostream>
using namespace std;
int T;
long f(long d,long N)
{
	if(N==0)return 0;
	long ans=N;
	ans+=N/(d-1)*((d-1)*(d-2)/2);
	long t=N%(d-1);
	ans+=t*(t-1)/2;
	return ans;
}
main()
{
	cin>>T;
	for(;T--;)
	{
		int d,A,B;
		cin>>d>>A>>B;
		long ans=f(d,B);
		if(A>0)ans-=f(d,A-1);
		cout<<ans<<endl;
	}
}