#include <bits/stdc++.h>
using namespace std;
/* typedef */
typedef long long ll;
typedef pair<int, int> pii;
/* constant */
const int INF = 1 << 30;
const ll LINF = 1LL << 50;
const int NIL = -1;
const int MAX = 10000;
const int mod = 1000000007;
const double pi = 3.141592653589;
/* global variables */
/* function */
void solve() {
    ll n, k, t;
    cin >> n >> k >> t;
    n = abs(n);
    if (n <= k * t) cout << "Yes" << '\n';
    else cout << "No" << '\n';
}
/* main */
int main(){
    solve();
}