#include <bits/stdc++.h> using namespace std; #define rep(i,n) for (int i = 0; i < (n); ++i) #define chmax(x,y) x = max(x,y) using ll = long long; using P = pair<int,int>; int main(){ ll n,k,t; cin>>n>>k>>t; if(abs(n)<=t*k){ cout << "Yes" << endl; }else{ cout << "No" << endl; } }