use std::{
    process::exit,
    collections::{
        HashSet,
        HashMap,
    },
};
use proconio::{
    input,
    marker::Chars,
};
// use itertools::*;

fn yes_no(cdt: bool) {
    println!("{}", if cdt { "Yes" } else { "No" })
}

fn main() {
    input! {
        a: [usize; 4],
        q: [usize; 4],
        mut t: usize,
    }

    let mut ans: usize = 0;

    for i in 0..4 {
        // println!("{t} {ans}");
        if a[i]*q[i] <= t {
            t -= a[i]*q[i];
            ans += a[i];
            continue;
        }

        ans += t/q[i];
        t -= q[i]*(t/q[i]);
    }

    println!("{ans}");
}