#include<bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i,m,n) for(int i=m; i<n; ++i)
#define repl(i,m,n) for(ll i=m; i<n; ++i)

int main(){
    ll D;
    cin >> D;

    ll val = D * 108LL;
    string ans = to_string(val);

    int n = ans.size();
    rep(i, 0, n){
        if(i == n-2) cout << '.';
        cout << ans[i];
    }
    cout << endl;

    return 0;
}