#include <bits/stdc++.h>

using std::cin;
using std::cout;
using ll = long long;

int main() {
	ll x, a, y, b;
	cin >> x >> a >> y >> b;
	
	if (x % y == 0 and b % a == 0) puts("Yes");
	else puts("No");
	
	return 0;
}