#include <bits/stdc++.h>
using namespace std;
const long long mod = 1e9 + 7;
const long double pi = acos(-1.0); 
typedef long long ll;

struct Node {int parent, left, right;};


int main() {
	cin.tie(0);
	ios::sync_with_stdio(false);

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