#include <bits/stdc++.h>
using namespace std;

int64_t sum(int64_t n) {
	return n * (n + 1) / 2;
}

int main() {
	int t; cin >> t;
	while(t--) {
		int64_t d, a, b; cin >> d >> a >> b;
		d--;
		int64_t dsum = sum(d);
		int64_t bsum = (b / d) * dsum + sum(b % d);
		--a;
		int64_t asum = (a / d) * dsum + sum(a % d);
		if(a < 0) asum = 0;
		cout << bsum - asum << '\n';
	}
	return 0;
}