#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (ll i = 0; i < (ll)(n); i++)
typedef long long ll;
typedef pair<ll, ll> P;
const ll M=1000000007;
//------------------------------------------//

int main(){
    ll N,K,T;cin>>N>>K>>T;
    N=abs(N);
    if(N>K*T){
        cout<<"No"<<endl;
    }else{
        cout<<"Yes"<<endl;
    }
}