#include <iostream>
using namespace std;

int main() {
    long long  N, K, T;
    cin >> N >> K >> T;
    if (N < 0) {
        N = 0 - N;
    }
    if (K * T >= N) {
        cout << "Yes" << endl;
    }else {
        cout << "No" << endl;
    }
}