#include using namespace std; typedef long long ll; typedef vector VI; typedef vector VVI; typedef vector VL; typedef vector VVL; typedef pair PII; #define FOR(i, a, n) for (int i = (int)a; i < (int)n; ++i) #define REP(i, n) FOR(i, 0, n) #define ALL(x) x.begin(), x.end() #define MOD 1000000007 #define INF 1000000000 #define PI 3.14159265359 #define EPS 1e-12 int main(void) { ll d; cin >> d; d *= 108; string ds = to_string(d); ds.insert(ds.size()-2, "."); cout << ds << endl; return 0; }