rt

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define fin for(int i=1;i<=n;i++)
const int N = 1e4 + 10;
const int inf = 0x3f;
const ll INF = 1e16;

int main() {
	int n;
	cin >> n;
	fin {
		int x, a, b;
		cin >> x >> a >> b;
		if (a > b)
			cout << x << endl;
		else if (b == 0) {
			cout << x *min(a, 1) << endl;
			continue;
		} else if (a == b) {
			if (x == 1)
				cout << -b << endl;
			else if (a == 1)
				cout << -1 << endl;
			else
				cout << x << endl;
		}
		if (a == 1)
			cout << x - ((x / b) + 1) *b << endl;
		if (a * x - x - b < 0)
			cout << x % (b - (a * x - x)) - (b - (a * x - x)) << endl;
		else
			cout << x << endl;
	}

	return 0;
}