import java.io.*;
import java.util.*;

class Main
{
    public static void main(String args[])throws Exception
    {
        BufferedReader bu=new BufferedReader(new InputStreamReader(System.in));
        StringBuilder sb=new StringBuilder();
        String s[]=bu.readLine().split(" ");
        long x=Long.parseLong(s[0]),a=Long.parseLong(s[1]),y=Long.parseLong(s[2]),b=Long.parseLong(s[3]);
        HashMap<Long,Long> fa=factors(x,a),fb=factors(y,b);

        boolean ans=true;
        for(long f:fb.keySet())
        {
            long u=fb.get(f),v=fa.getOrDefault(f,0l);
            if(v<u) {ans=false; break;}
        }
        if(ans) sb.append("Yes\n");
        else sb.append("No\n");
        System.out.print(sb);
    }

    static HashMap<Long,Long> factors(long a,long b)
    {
        long i;
        HashMap<Long,Long> hm=new HashMap<>();
        for(i=2;i*i<=a;i++)
        if(a%i==0)
        {
            long c=0;
            while(a%i==0)
            {
                a/=i; c++;
            }
            hm.put(i,c*b);
        }
        if(a>1) hm.put(a,b);
        return hm;
    }
}