func_code_string: #include <bits/stdc++.h>   using namespace std;   const int maxn = 5e4 + 5;   int main() {     int k, n, s, p;     cin >> k >> n >> s >> p;     int ans = k * (n % s == 0 ? n / s : n / s + 1);     if (ans % p == 0)       cout << ans / p << endl;     else       cout << ans / p + 1 << endl;     return 0;   }   