1065A - Vasya and Chocolate

#include<bits/stdc++.h>

using namespace std;

int main()

{

   int t;

   cin>>t;

   while(t>0)

   {

       long long int s,a,b,c;

       cin>>s>>a>>b>>c;

       long long int main = s/c;

       long long int free_n = main/a;

       long long int f = free_n*b;

       long long int total = main+f;

       cout<<total<<endl;

       t--;

   }

}