#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i, s, e) for (int i = (int)(s); i < (int)(e); ++i)
#define all(a) (a).begin(),(a).end()

int main() {
    cin.tie(nullptr);
    ios_base::sync_with_stdio(false);
    
    ll A, B, C, D, P, Q, R, S, T;
    cin >> A >> B >> C >> D >> P >> Q >> R >> S >> T;
    cout <<  (A*P + B*Q + C*R + D*S <= T ? "Yes\n" : "No\n"); 
}