fn gcd(a: usize, b: usize) -> usize {
    if b == 0 { return a; }
    gcd(b, a%b)
}

fn lcm(a: usize, b: usize) -> usize {
    a / gcd(a, b) * b
}

fn main() {
    let mut temp = String::new();
    std::io::stdin().read_line(&mut temp).ok();
    let temp: Vec<usize> = temp.trim().split_whitespace().map(|s| s.parse().unwrap()).collect();
    let a = temp[0];
    let b = temp[1];
    let c = temp[2];
    let d = temp[3];
    let e = temp[4];

    let lcmval = lcm(a+b, c+d);
    let mut cnt = 0usize;
    for i in 0..lcmval {
        if i % (a+b) < a && i % (c+d) < c {
            cnt += 1;
        }
    }
    let mut result = cnt * (e / lcmval);
    for i in e/lcmval*lcmval..e {
        if i % (a+b) < a && i % (c+d) < c {
            result += 1;
        }
    }
    println!("{}", result);
}