#include<bits/stdc++.h>
using namespace std;
//#define int long long
#define REP(i,m,n) for(int i=(m);i<(n);i++)
#define rep(i,n) REP(i,0,n)
#define pb push_back
#define all(a) a.begin(),a.end()
#define rall(c) (c).rbegin(),(c).rend()
#define mp make_pair
#define endl '\n'
#define vec vector<ll>
#define mat vector<vector<ll> >
#define fi first
#define se second
typedef long long ll;
typedef unsigned long long ull;
typedef pair<ll,ll> pll;
typedef long double ld;
typedef complex<double> comp;
const ll INF=1e9+7;
const ll MOD=998244353;
const int MAX=200010;


signed main(){
    cin.tie(0);
    ios::sync_with_stdio(false);
    ll n;cin>>n;
    ll k,t;cin>>k>>t;
    if(n<0)n=-n;
    if(k*t<n){
        cout<<"No"<<endl;
    }else{
        cout<<"Yes"<<endl;
    }
}