#include "bits/stdc++.h"
using namespace std;

#define REP(i, n) for(int i=0; i<(n); i++)
#define int long long

int N,K;
signed main()
{
    cin >> N;
    if (N > 1e10) {
        printf("%.3f\n", 1.08 * N);
    } else {
        printf("%.14f\n", 1.08 * N);
    }
    return 0;
}