#include <iostream>
    #include <math.h>
    using namespace std;
 
    int main(){
    	long double calosc=0;
    	int a;
    	long long int N;
    	long long int M;
    	long double wynik;
    	long long int pom;
    	cin >> a;
    	for (int i = 0; i < a; i++) {
    		cin >> N >> M;
    		int *tablica = new int[N];
    		for (int j = 0; j < N; j++) {
    			cin >> tablica[j];
    			calosc+=floor((24*60*60)/tablica[j]);
    		}
    		wynik = calosc / M;
    		cout << ceil(wynik);
    		calosc = 0;
    	}
    	return 0;
    }

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2
2 10
3600
1800
3 356
123
32999
10101