import java.io.*; import java.util.*; public class Main { public static void main(String[] args) throws Exception { Scanner sc = new Scanner(); double d = sc.nextDouble(); long base = 1; while ((long)d != d) { d *= 10; base *= 10; } long n = (long)d; long gcd = getGCD(base, n); System.out.printf("%d/%d\n", n / gcd, base / gcd); } static long getGCD(long x, long y) { if (y == 0) { return x; } else { return getGCD(y, x % y); } } } class Scanner { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); StringTokenizer st = new StringTokenizer(""); public Scanner() throws Exception { } public int nextInt() throws Exception { return Integer.parseInt(next()); } public long nextLong() throws Exception { return Long.parseLong(next()); } public double nextDouble() throws Exception { return Double.parseDouble(next()); } public String next() throws Exception { while (!st.hasMoreTokens()) { st = new StringTokenizer(br.readLine()); } return st.nextToken(); } }