#include <iostream>
#include <math.h>
 
using namespace std;
 
float w[10], t, q=0;
long long z;
int x, y;
 
int main()
{
    cin>>x;
    for (int i=0; i<=x; i++)
    {
        cin >> y >> z;
 
            for (int j=0; j<y; j++)
            {
                w[j] = 0;
                cin >> w[j];
                t = 86400 / w[j];
                w[j] = t/z;
                q += w[j];
            }
        float n = roundf(q * 100) / 100;
        q = (ceil( n ));
        cout<<q<<endl;
        q = 0;
}
    return 0;
}
 

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MgoyIDEwCjM2MDAKMTgwMAozIDM1NgoxMjMKMzI5OTkKMTAxMDE=

2
2 10
3600
1800
3 356
123
32999
10101