#include "bits/stdc++.h"
//#include <atcoder/all>

using namespace std;
//using namespace atcoder;

#define ll long long
ll INF = (1LL << 60);

signed main() {
	ll n, k, t; cin >> n >> k >> t;
	if (abs(n) <= k * t)cout << "Yes" << endl;
	else cout << "No" << endl;
	return 0;
}