#include <bits/stdc++.h>

#define rep(X, N) for (ll X = 0LL; X < (N); X++)
#define ALL(V) (V).begin(), (V).end()
#define endl "\n"

using namespace std;
typedef unsigned int uint;
typedef long long ll;
typedef unsigned long long ull;

const double PI = 3.1415926535897932384626;
const ll MODN = 1000000007;
const ll MODN2 = 998244353;

int main(){

    ll n, k, t;
    cin >> n >> k >> t;

    cout << (k * t >= abs(n) ? "Yes" : "No") << endl;

    return 0;
}