#include <algorithm>
#include <cmath>
#include <cstdio>
#include <deque>
#include <iostream>
#include <map>
#include <numeric>
#include <queue>
#include <set>
#include <stack>
#include <string>
#include <vector>

using namespace std;

typedef long long ll;

#define MOD 1000000007

int main() {
  ll d;
  cin >> d;
  d = d * 108;
  string s = to_string(d);
  int n = s.size();
  for (int i = 0; i < n; ++i) {
    cout << s[i];
    if (i == n - 3) cout << ".";
  }
  cout << endl;
  return 0;
}