#include<bits/stdc++.h>
using namespace std;
using ll = long long;
using VI = vector<int>;
using P = pair<int, int>;
constexpr int INF = 1001001001;
constexpr ll LINF = 1001001001001001001ll;
#define rep(i, n) for (ll i = 0; i < (int)(n); i++)

int main(){
    int time = 0;
    vector<int> a(4), p(4);
    int t;
    rep(i, 4) cin >> a[i];
    rep(i, 4) cin >> p[i];
    cin >> t;
    // vector<vector<int>> v(n, vector<int>(m));
    rep(i, 4){
        time += a[i] * p[i];
    }
    string ans = "No";
    if(time <= t) ans = "Yes";


    cout << ans << endl;

}