#[allow(unused)]
use proconio::{input, marker::Chars};

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")
    }
}