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

    if y == 1 {
        println!("Yes");
        return;
    }
    let mut val = 0usize;
    let mut target = x.max(y);
    while target % x.min(y) == 0 {
        target /= x.min(y);
        val += 1;
    }
    if x >= y {
        if val == 0 {
            println!("No");
        } else if (val * a) % b == 0 {
            println!("Yes");
        } else {
            println!("No");
        }
    } else {
        if val == 0 || target > 1 {
            println!("No");
        } else if a % (val * b) == 0  {
            println!("Yes");
        } else {
            println!("No");
        }
    }
}