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

using ll = long long;

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\n";
  else cout << "No\n";
}