#include <bits/stdc++.h>
using namespace std;
using namespace chrono;
#if __has_include(<atcoder/all>)
#include <atcoder/all>
using namespace atcoder;
#endif

int main() {
    int64_t n, k, t;
    cin >> n >> k >> t;

    if (abs(n) <= k * t) {
        cout << "Yes" << endl;
    } else {
        cout << "No" << endl;
    }

    return 0;
}