geometry

#include <bits/stdc++.h>

using namespace std;
#define ll long long
#define pb push_back
#define pi acos(-1)
int main()
{
    int t;
    cin >> t;
    while(t--) {
        double x;
        cin >> x;
        double ans = 2.0 * sqrt(x/(3-(pi/2)));
        cout << fixed << setprecision(10) << ans << endl;
    }
    return 0;
}