package extra;

import java.io.PrintWriter;
import java.util.Arrays;
import java.util.Scanner;

public class P3072_2 {
	static Scanner in;
	static PrintWriter out;
	static String INPUT = "";

	static void solve()
	{
		int[] a = new int[35];
		int[] h = new int[35];
		StringBuilder sb = new StringBuilder();
		for(int T = ni();T > 0;T--){
			long x = nl(); // 00 * 11
			if(x != 0) {
				for (int i = 14; i >= 0; i--) {
					h[i] = (int) (x % 100);
					x /= 100;
				}
				double t = 0;
				double u = 0;
				for (int i = 0; i < 30; i++) {
					for (int s = t == 0 ? 9 : (int)(u/t);s >= 0;s--){
						if ((t + s) * s <= u) {
							a[i + 5] += s;
							u = (u - (t + s) * s) * 100 + h[i];
							t = (t + 2 * s) * 10;
							break;
						}
					}
				}
				for (int i = 34; i >= 1; i--) {
					if (a[i] >= 10) {
						a[i] -= 10;
						a[i - 1]++;
					}
				}

			}
			int nzf = -1;
			for (int i = 0; i < 35; i++) {
				if (nzf == -1 && a[i] != 0) {
					nzf = i;
				}
				if(nzf == -1 && i == 20){
					nzf = 20;
				}
				if(nzf != -1 && i <= nzf + 18){
					sb.append(a[i]);
//					out.print(a[i]);
				}
				if(i == 20){
					sb.append(".");
//					out.print(".");
				}
			}
			sb.append("\n");
//			out.println();
		}
		out.print(sb);
	}

	public static void main(String[] args) throws Exception
	{
//		int n = 1000000, m = 99999;
//		Random gen = new Random();
//		StringBuilder sb = new StringBuilder();
//		sb.append(n + " ");
//		for (int i = 0; i < n; i++) {
//			sb.append(Math.abs(gen.nextLong() % 1000000000000000000L) + " ");
//		}
//		INPUT = sb.toString();


		long S = System.currentTimeMillis();
		in = INPUT.isEmpty() ? new Scanner(System.in) : new Scanner(INPUT);
		out = new PrintWriter(System.out);
		
		solve();
		out.flush();
		long G = System.currentTimeMillis();
		tr(G-S+"ms");
	}
	
	static int ni() { return Integer.parseInt(in.next()); }
	static long nl() { return Long.parseLong(in.next()); }
	static double nd() { return Double.parseDouble(in.next()); }
	static void tr(Object... o) { if(INPUT.length() != 0)System.out.println(Arrays.deepToString(o)); }
}