fn lcm(a: u64, b: u64) -> u64 {
	let (mut g, mut r) = (a, b);
	while r != 0 {
		(g, r) = (r, g % r);
	}
	a / g * b
}

fn main() {
	let mut s = String::new();
	std::io::stdin().read_line(&mut s).ok();
	let n: Vec<u64> = s.split_whitespace().flat_map(str::parse).collect();
	let (x, y) = (n[0] + n[1], n[2] + n[3]);
	let l = lcm(x, y);
	let (mut a, mut b, r) = (0, 0, n[4] % l);
	for i in 0..l {
		if i % x < n[0] && i % y < n[2] {
			a += 1;
			if i < r {
				b += 1;
			}
		}
	}
	println!("{}", n[4] / l * a + b)
}