using System;
using System.Linq;

namespace Sample
{
    class Program
    {
        static void Main(string[] args)
        {
            var list = Console.ReadLine().Split(' ').Select(x => int.Parse(x)).ToList();
            var (X, A, Y, B) = (list[0], list[1], list[2], list[3]);
            var ans = (long)Math.Pow(X, A) % Y == 0 ? "Yes" : "No";
            Console.WriteLine(ans);
        }
    }
}