#include <cmath>
#include <cstdio>
int main() {
    int T;
    scanf("%d",&T);
    for(int kcase = 1; kcase <= T; kcase++) {
        int n;
        scanf("%d",&n);
        printf("Case #%d:\n",kcase);
        printf("%.6f %.6f\n",1.0+(n-2.0)/27*19,(46.0-38.0/n)/(19.0-11.0/n));
    }
    return 0;
}