use proconio::input;

fn main() {
    input! {
        num: [usize; 4],
        required: [usize; 4],
        t: usize,
    }

    let ans = num
        .iter()
        .zip(required.iter())
        .map(|(&n, &r)| n * r)
        .sum::<usize>()
        <= t;
    println!("{}", if ans { "Yes" } else { "No" });
}