func_code_string: #include <bits/stdc++.h>   using namespace std;   long double n, l, k, v1, v2;   int main() {     cout << fixed << setprecision(10);     cin >> n >> l >> v1 >> v2 >> k;     if (v2 <= v1) {       cout << l / (v1 * 1.0) << endl;       return 0;     }     if (n <= k) {       cout << l / (v2 * 1.0) << endl;       return 0;     }     int T = ceil(n / (k * 1.0));     long double K = ((T - 1) * (1 + (v2 - v1) / ((v2 + v1) * 1.0))) * v1;     K += v2;     K = l / K;     long double ans = K * (T + (T - 1) * (v2 - v1) / (v2 + v1));     cout << ans << endl;   }   