#include <iostream>
#include <vector>
#include <map>
#include <set>
#include <queue>
#include <stack>
#include <algorithm>
#include <cstdio>
#include <cstdlib>
#include <string>
#include <cstring>
#include <cmath>
#include <ctime>
using namespace std;

#define ll long long
#define clr(s) memset(s,0,sizeof(s))
#define lson l,m,rt<<1
#define rson m+1,r,rt<<1|1

const double PI = acos(-1);
const ll mod = 1e9+7;

int t,n;
double ansa,ansb;

int main()
{
    cin>>t;
    int cas=1;
    while(t--){
        cin>>n;
        ansa=1.0+((double)n-2.0)*19.0/27.0;
        ansb=(46.0-38.0/(double)n)/(19.0-11.0/(double)n);
        printf("Case #%d:\n%.6f %.6f\n",cas++,ansa,ansb);
    }
    return 0;
}