#include<bits/stdc++.h>
using namespace std;
using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
#define endl "\n"
#define rep(i, a, n) for (int i = a; i < n; ++i)
#define all(x) (x).begin(), (x).end()

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    ll n, k, t;
    cin >> n >> k >> t;

    if (abs(n) <= t * k) {
        cout << "Yes" << endl;
    } else {
        cout << "No" << endl;
    }
    return 0;
}