#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define ll long long
#define INF 9e18;
int main(){
    cin.tie(0)->sync_with_stdio(0);
    cout.tie(0);
    int A,B,C,D,P,Q,R,S,T;
    cin>>A>>B>>C>>D>>P>>Q>>R>>S>>T;
    int timer=A*P+B*Q+C*R+D*S;
    if(timer<=T) cout<<"Yes"<<endl;
    else cout<<"No"<<endl;
}