#include <bits/stdc++.h>
using namespace std;
#define fr(i, p, n) for(int i = p; i < n; i++)
#define rev(i, n, p) for(int i = n; i >= p; i--)
typedef long long int LL;
const int mod = 1e9 + 7;
#define MX INT_MAX
#define MN INT_MIN

int main() {
	LL n, k, t; cin >> n >> k >> t;

	k*t < abs(n) ? cout << "No" : cout << "Yes";
	return 0;
}