from math import gcd
s = input()
if not "." in s:
    print(s + "/1")
else:
    a, b = s.split(".")
    x = int(a + b)
    y = 10 ** len(b)
    g = gcd(x, y)
    x //= g
    y //= g
    print(x, "/", y, sep="")