#![allow(unused_macros)]
#![allow(dead_code)]
#![allow(unused_imports)]

// # ファイル構成
// - use 宣言
// - lib モジュール
// - main 関数
// - basic モジュール
//
// 常に使うテンプレートライブラリは basic モジュール内にあります。
// 問題に応じて使うライブラリ lib モジュール内にコピペしています。
// ライブラリのコードはこちら → https://github.com/RheoTommy/at_coder
// Twitter はこちら → https://twitter.com/RheoTommy

use std::collections::*;
use std::io::{stdout, BufWriter, Write};

use crate::basic::*;
use crate::lib::*;

pub mod lib {
    /// O(logN)
    pub fn pow(mut x: i64, mut n: u64) -> i64 {
        let mut res = 1;
        while n != 0 {
            if n & 1 == 1 {
                res *= x;
            }
            n /= 2;
            x *= x;
        }
        res
    }

    /// O(logN)
    pub fn mod_pow(mut x: i64, mut n: u64, m: i64) -> i64 {
        let mut res = 1;
        while n != 0 {
            if n & 1 == 1 {
                res *= x;
            }
            n /= 2;
            x *= x;
            res %= m;
            x %= m;
        }
        res % m
    }

    /// O(logN)
    pub fn gcd(mut a: u64, mut b: u64) -> u64 {
        while b != 0 {
            let tmp = b;
            b = a % b;
            a = tmp;
        }
        a
    }

    /// O(logN)
    pub fn lcm(a: u64, b: u64) -> u64 {
        let g = gcd(a, b);
        a * b / g
    }

    /// O(logN)
    pub fn ext_gcd(a: i64, b: i64) -> (i64, i64, i64) {
        if b == 0 {
            return if a < 0 { (-a, -1, 0) } else { (a, 1, 0) };
        }
        let (g, s, t) = ext_gcd(b, a % b);
        return (g, t, s - (a / b) * t);
    }

    pub fn mod_inv(a: i64, m: i64) -> Option<i64> {
        let (g, xi, _) = ext_gcd(a, -m);
        if g != 1 {
            None
        } else {
            Some((xi % m + m) % m)
        }
    }

    pub fn mod_div(a: i64, b: i64, n: i64) -> Option<i64> {
        let d = gcd(gcd(a.abs() as u64, b.abs() as u64), n.abs() as u64) as i64;
        let inv = mod_inv(a / d, n / d)?;
        let n = n / d;
        Some(((inv * b / d) % n + n) % n)
    }

    /// O(√NlogN)
    pub fn divisors(n: u64) -> Vec<u64> {
        let mut res = Vec::new();
        for i in 1.. {
            if i * i > n {
                break;
            }
            if n % i == 0 {
                res.push(i);
                if n / i != i {
                    res.push(n / i);
                }
            }
        }
        res.sort();
        res
    }

    /// O(√N)
    pub fn is_prime(n: u64) -> bool {
        for i in 2.. {
            if i * i > n {
                break;
            }
            if n % i == 0 {
                return false;
            }
        }
        n > 1 && true
    }

    /// O(√N)
    pub fn factorization(mut n: u64) -> std::collections::HashMap<u64, u64> {
        let mut res = std::collections::HashMap::new();
        for i in 2.. {
            if i * i > n {
                break;
            }
            let mut ex = 0;
            while n % i == 0 {
                ex += 1;
                n /= i;
            }
            if ex != 0 {
                res.insert(i, ex);
            }
        }
        if n != 0 {
            *res.entry(n).or_insert(0) += 1;
        }
        res
    }

    pub fn float_to_int(s: &[char], x: u32) -> i64 {
        if !s.contains(&'.') {
            return s.iter().collect::<String>().parse::<i64>().unwrap() * 10i64.pow(x);
        }
        let n = s.len();
        let i = s
            .iter()
            .enumerate()
            .filter(|(_, ci)| **ci == '.')
            .next()
            .unwrap()
            .0;
        let l = n - i - 1;
        let t = s
            .iter()
            .skip_while(|ci| **ci == '0')
            .filter(|ci| **ci != '.')
            .collect::<String>()
            .parse::<i64>()
            .unwrap()
            * 10i64.pow(x - l as u32);
        t
    }
}

fn main() {
    let mut sc = Scanner::new();
    let x = sc.next_string();
    let x = float_to_int(&x.chars().collect::<Vec<_>>(), 8);
    let g = gcd(x as u64, 100000000) as i64;
    println!("{}/{}", x / g, 100000000 / g);
}

pub mod basic {
    pub const U_INF: u64 = (1 << 60) + (1 << 30);
    pub const I_INF: i64 = (1 << 60) + (1 << 30);

    pub struct Scanner {
        buf: std::collections::VecDeque<String>,
        reader: std::io::BufReader<std::io::Stdin>,
    }

    impl Scanner {
        pub fn new() -> Self {
            Self {
                buf: std::collections::VecDeque::new(),
                reader: std::io::BufReader::new(std::io::stdin()),
            }
        }

        fn scan_line(&mut self) {
            use std::io::BufRead;
            let mut flag = 0;
            while self.buf.is_empty() {
                let mut s = String::new();
                self.reader.read_line(&mut s).unwrap();
                let mut iter = s.split_whitespace().peekable();
                if iter.peek().is_none() {
                    if flag >= 5 {
                        panic!("There is no input!");
                    }
                    flag += 1;
                    continue;
                }

                for si in iter {
                    self.buf.push_back(si.to_string());
                }
            }
        }

        pub fn next<T: std::str::FromStr>(&mut self) -> T {
            self.scan_line();
            self.buf
                .pop_front()
                .unwrap()
                .parse()
                .unwrap_or_else(|_| panic!("Couldn't parse!"))
        }

        pub fn next_usize(&mut self) -> usize {
            self.next()
        }

        pub fn next_int(&mut self) -> i64 {
            self.next()
        }

        pub fn next_uint(&mut self) -> u64 {
            self.next()
        }

        pub fn next_chars(&mut self) -> Vec<char> {
            self.next::<String>().chars().collect()
        }

        pub fn next_string(&mut self) -> String {
            self.next()
        }

        pub fn next_char(&mut self) -> char {
            self.next()
        }

        pub fn next_float(&mut self) -> f64 {
            self.next()
        }

        pub fn next_vec<T: std::str::FromStr>(&mut self, n: usize) -> Vec<T> {
            (0..n).map(|_| self.next()).collect::<Vec<_>>()
        }
    }
}