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

int main() {
    ll n, k, t;
    cin >> n >> k >> t;
    if (abs(n) <= k * t) cout << "Yes" << endl;
    else cout << "No" << endl;
}