import java.io.*;
import java.util.*;

class Result {
    public static int chocolateFeast(int n, int c, int m) {
        int totalBars = n / c;
        int totalWrappers = totalBars;
        while (totalWrappers >= m) {
            int newBars=totalWrappers / m; 
            totalBars +=newBars; 
            totalWrappers= totalWrappers% m+newBars; 
        }
        return totalBars;
    }
}

public class trys {
    public static void main(String[] args) throws IOException {
        Scanner s = new Scanner(System.in);
        int testCaseCount = s.nextInt();
        for (int i = 0; i < testCaseCount; i++) {
            int n = s.nextInt(); 
            int c = s.nextInt(); 
            int m = s.nextInt(); 
            System.out.println(Result.chocolateFeast(n, c, m));
        }
        s.close();
    }
}