import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		int t = sc.nextInt();
		for (int z = 0; z < t; z++) {
			long d = sc.nextInt();
			long x = sc.nextInt();
			long y = sc.nextInt();

			long ok = 0;
			long ng = d * 2 + 1;
			while (Math.abs(ok - ng) > 1) {
				long mid = (ok + ng) / 2;
				long nx = x + y * mid;
				long ny = y - x * mid;
				if (nx <= d && 0 <= ny) {
					ok = mid;
				} else {
					ng = mid;
				}
			}
			long bx = x + y * ok;
			long by = y - x * ok;
			long ans1 = Math.abs(x * by - bx * y);

			ok = 0;
			ng = d * 2 + 1;
			while (Math.abs(ok - ng) > 1) {
				long mid = (ok + ng) / 2;
				long nx = x - y * mid;
				long ny = y + x * mid;
				if (0 <= nx && ny <= d) {
					ok = mid;
				} else {
					ng = mid;
				}
			}
			bx = x - y * ok;
			by = y + x * ok;
			long ans2 = Math.abs(x * by - bx * y);

			System.out.println(Math.max(ans1, ans2));
		}
		sc.close();
	}
}