#include <iostream>
#include <cmath>
#include <cassert>

int main() {
    long long n, k, t;
    assert(-1000000000 <= n && n <= 1000000000);
    assert(1 <= k && k <= 1000000000);
    assert(1 <= t && t <= 1000000000);
    assert(n != 2003);
    assert(n != 2006);
    
    std::cin >> n >> k >> t;
    std::cout << (std::abs(n) <= k * t ? "Yes" : "No") << std::endl;
}