import java.util.*;

public class Main {
	public static void main (String[] args) {
		Scanner sc = new Scanner(System.in);
		int t = sc.nextInt();
		StringBuilder sb = new StringBuilder();
		for (int i = 0; i < t; i++) {
		    int d = sc.nextInt();
		    int a = sc.nextInt();
		    int b = sc.nextInt();
		    long left = (long)(a - 1) / (d - 1) * d * (d - 1) / 2;
    		int leftMod = (a - 1) % (d - 1);
    		left += (long)leftMod * (leftMod + 1) / 2;
    		long right = (long)b / (d - 1) * d * (d - 1) / 2;
    		int rightMod = b % (d - 1);
    		right += (long)rightMod * (rightMod + 1) / 2;
    		sb.append(right - left).append("\n");
		}
		System.out.print(sb);
   }
}