/*
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 */

import java.util.ArrayList;
import java.util.Scanner;

/**
 *
 * @author vaskol
 */
public class mortgage {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        String vstup = "";
        ArrayList<String> zoz = new ArrayList<String>();
        Scanner scan = new Scanner(System.in);
        vstup = scan.nextLine();

        while (vstup.compareTo("0 0 0 0") != 0) {
            zoz.add(vstup);
            vstup = scan.nextLine();
        };
        
        
        for (String jeden : zoz) {
            String[] vysledok = jeden.split(" ");
            int s = Integer.parseInt(vysledok[1]);
            float dan = Float.parseFloat(vysledok[3]) / 100 / 12;
            float pompocet = Integer.parseInt(vysledok[0]);
            boolean help = false;
            int cas=Integer.parseInt(vysledok[2])*12;
           while((pompocet>0)||(cas>0)){
               pompocet += pompocet*dan -s;
               cas--;
            }
           if(cas>=0) System.out.println("YES"); else System.out.println("NO");
            
           
        }
    }
}