#include <iostream>
#include <cstdio>
#include <cstring>
#include <algorithm>
using namespace std;

int main()
{
    int t,n;
    scanf("%d",&t);
    for(int te =1;te<=t;te++)
    {
        scanf("%d",&n);
        double ans1=1+((n-2)*19)*1.0/27.0;
        double ans2=(46-38.0/n)*1.0/((19-11.0/n)*1.0);
        printf("Case #%d:\n",te);
        printf("%.6f %.6f\n",ans1,ans2);
    }
    return 0;
}