#include <bits/stdc++.h>
using namespace std;
using ll = long long;

void solve() {
  ll n, k, t;
  cin >> n >> k >> t;
  cout << ((abs(n) <= k * t) ? "Yes" : "No") << endl;
}

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