import java.util.*;
class workers{
    private double totalwork;
    private double ind;
    private int worker;
    private double worktime;
    public workers (double totalwork,double ind, int worker ,double worktime){
        this.totalwork=totalwork;
        this.ind=ind;
        this.worker=worker;
        this.worktime=worktime;
    }   
    public  double timeind(){
        
      
       if(ind<=0){
           System.out.println("-1");
       return ;
           
       }
       return   totalwork/ind;
    }
    public double grp(){
       
      if(worker<=0||worktime<=0){
          System.out.println("-1");
          return;
      }
    
       double grp=worker*worktime;
       
       return totalwork/grp;
    }
    
}
class main{
    public static void main(String []args){
        Scanner sc= new Scanner(System.in);
         double totalwork=sc.nextDouble();
        
         double ind= sc.nextDouble();
         int worker=sc.nextInt();
         double worktime=sc.nextDouble();
          if(totalwork<=0||ind<=0||worker<=0||worktime<=0){
             System.out.println("Invalid input");
             return;
         }
        
         
         
         workers w = new workers(totalwork,ind,worker,worktime);
         System.out.println(w.timeind());
         System.out.println(w.grp());
}}