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

fn main() {
    let mut x = String::new();
    std::io::stdin().read_line(&mut x).ok();
    let x = x.trim();
    let val = x.split(".").collect::<Vec<_>>();
    if val.len() == 1 {
        println!("{}/1", val[0]);
        return;
    }
    let num = val[0].parse::<usize>().unwrap() * 10usize.pow(val[1].len() as u32) + val[1].parse::<usize>().unwrap();
    let denom = 10usize.pow(val[1].len() as u32);
    let gcdval = gcd(num, denom);
    println!("{}/{}", num/gcdval, denom/gcdval);
}