use std::io::Read;
fn p(mut r: u64, mut n: u64, d: u64) -> u64 {
	let mut a = 1;
	while n > 0 {
		if n & 1 == 1 {
			a = a * r % d;
		}
		r = r * r % d;
		n >>= 1;
	}
	a
}
fn main() {
	let mut s = String::new();
	std::io::stdin().read_to_string(&mut s).ok();
	let n: Vec<u64> = s.split_whitespace().flat_map(str::parse).collect();
	let d = 1000000007;
	println!("{}", p(n[0] * n[1] % d * n[2] % d, p(2, n[3], d - 1), d))
}