import java.util.*;
public class pct{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        double tw = sc.nextDouble();
        double iwr = sc.nextDouble();
        int now = sc.nextInt();
        double wrpw = sc.nextDouble();
        sc.close();
        if(tw<=0){
            System.out.println("Invalid input");
            return;
        }
        double individualWorker;
        if(iwr<=0){
            individualWorker = -1;
        }else{
            individualWorker=tw/iwr;
        }
        double groupWorker;
        if(now<=0 ||wrpw<=0){
            groupWorker = -1;
        }else{
            double tgr = now*wrpw;
            groupWorker=tw/tgr;
        }
        System.out.println(individualWorker);
        System.out.printf(groupWorker);
    }
}