#include <bits/stdc++.h>
//#include <atcoder/all>
using namespace std;
//using namespace atcoder;
//using mint = modint1000000007;
//const int mod = 1000000007;
//using mint = modint998244353;
//const int mod = 998244353;
//const int INF = 1e9;
//const long long LINF = 1e18;
//const bool debug = false;
#define rep(i, n) for (int i = 0; i < (n); ++i)
#define rep2(i,l,r)for(int i=(l);i<(r);++i)
#define rrep(i, n) for (int i = (n-1); i >= 0; --i)
#define rrep2(i,l,r)for(int i=(r-1);i>=(l);--i)
#define all(x) (x).begin(),(x).end()
#define allR(x) (x).rbegin(),(x).rend()
#define endl "\n"
#define P pair<int,int>
template<typename A, typename B> inline bool chmax(A & a, const B & b) { if (a < b) { a = b; return true; } return false; }
template<typename A, typename B> inline bool chmin(A & a, const B & b) { if (a > b) { a = b; return true; } return false; }
map <long long, long long> calc(long long n, long long m) {
	map<long long, long long>mp;
	for (long long i = 2; i*i <= n; i++) {
		int c = 0;
		while (n%i == 0) { // 素数で割り切れなくなるまで割っていく
			c++;//割った個数を配列に足す
			n /= i;
		}
		if (0 != c) mp[i] = m * c;
		if (1 == n) break;
	}
	if (1 != n) mp[n] = m * 1;
	return mp;
}
int main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	long long x, a, y, b;
	cin >> x >> a >> y >> b;
	auto mpx = calc(x, a);
	auto mpy = calc(y, b);
	bool ch = true;
	for (auto p : mpy) {
		if (0 == mpx.count(p.first)) ch = false;
		else if (p.second > mpx[p.first])ch = false;
	}
	if (ch) cout << "Yes" << endl;
	else cout << "No" << endl;
	return 0;
}