#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i = 0; i < (n);i++)
#define sz(x) int(x.size())
typedef long long ll;
typedef long double ld;
typedef pair<int,int> P;

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