func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n;     cin >> n;     while (n--) {       long long s, a, b, c;       cin >> s >> a >> b >> c;       s /= c;       s += (s / a) * b;       cout << s << endl;     }     return 0;   }   