import java.util.Scanner;
public class obza {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int liczba_ludzi; //10.000
int w_jednym_pudelku; //1.000.000.000
int n, k,i; //do pentli
int sec = 86400;
n = sc.nextInt();
for (k = 0; k < n; k++) {
int suma = 0;
liczba_ludzi = sc.nextInt();
w_jednym_pudelku = sc.nextInt();
int zestaw_czasow[] = new int[liczba_ludzi];
for (i = 0; i < liczba_ludzi; i++)
zestaw_czasow[i] = sc.nextInt();
for (i = 0; i < liczba_ludzi; i++) zestaw_czasow[i] = sec / zestaw_czasow[i];
for (i = 0; i < liczba_ludzi; i++) suma = suma + zestaw_czasow[i];
if (suma % w_jednym_pudelku == 0) System.out.println(suma / w_jednym_pudelku);
else {
int wynik = suma / w_jednym_pudelku + 1;
System.out.println(wynik);
}
}
}
}
{"html5":"htmlmixed","css":"css","javascript":"javascript","php":"php","python":"python","ruby":"ruby","lua":"text\/x-lua","bash":"text\/x-sh","go":"go","c":"text\/x-csrc","cpp":"text\/x-c++src","diff":"diff","latex":"stex","sql":"sql","xml":"xml","apl":"apl","asterisk":"asterisk","c_loadrunner":"text\/x-csrc","c_mac":"text\/x-csrc","coffeescript":"text\/x-coffeescript","csharp":"text\/x-csharp","d":"d","ecmascript":"javascript","erlang":"erlang","groovy":"text\/x-groovy","haskell":"text\/x-haskell","haxe":"text\/x-haxe","html4strict":"htmlmixed","java":"text\/x-java","java5":"text\/x-java","jquery":"javascript","mirc":"mirc","mysql":"sql","ocaml":"text\/x-ocaml","pascal":"text\/x-pascal","perl":"perl","perl6":"perl","plsql":"sql","properties":"text\/x-properties","q":"text\/x-q","scala":"scala","scheme":"text\/x-scheme","tcl":"text\/x-tcl","vb":"text\/x-vb","verilog":"text\/x-verilog","yaml":"text\/x-yaml","z80":"text\/x-z80"}