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