use proconio::input;

fn main() {
    input!{
        A: i32,
        B: i32,
        C: i32,
        D: i32,
        P: i32,
        Q: i32,
        R: i32,
        S: i32,
        T: i32
    }
    if A*P+B*Q+C*R+D*S <= T {
        println!("Yes");
    } else {
        println!("No");
    }
}