import sys

sys.setrecursionlimit(10 ** 6)
stdin = sys.stdin

ni = lambda: int(ns())
na = lambda: list(map(int, stdin.readline().split()))
ns = lambda: stdin.readline().strip()
ntp = lambda: tuple(map(int, stdin.readline().split()))
mod = 10 * 9 + 7
inf = 2 << 60

x = list((ns() + '.0').split('.'))

a, b = x[0], x[1]

if b != '0':
    lb = 10 ** len(b)

    a = int(a)
    b = int(b)

    x = a * lb + b
    y = lb

    def gcd(x, y):
        if x < y:
            x, y = y, x
        while y != 0:
            x, y = y, x % y
        return x

    g = gcd(x, y)

else:
    x = int(a)
    y = 1
    g = 1

print(f'{x // g}/{y // g}')