#include <iostream>

using lint = long long;

void solve() {
    lint n, k, t;
    std::cin >> n >> k >> t;
    std::cout << (std::abs(n) <= k * t ? "Yes" : "No") << "\n";
}

int main() {
    std::cin.tie(nullptr);
    std::ios::sync_with_stdio(false);

    solve();

    return 0;
}