#include <bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < n; i++)
using namespace std;

typedef long long ll;

int main() {
    ll N, K, T;
    cin >> N >> K >> T;
    N = abs(N);
    if (T * K >= N) cout << "Yes\n";
    else cout << "No\n";
}