from math import gcd

S = input()

if S.count("."):
    sa, sb = S.split(".")
    dig = len(sb)
    a = int(sa)
    b = int(sb)

    x = a*10**dig + b 
    y = 10**dig
    g = gcd(x, y)
    x //= g
    y //= g
else:
    x = int(S)
    y = 1

print("{}/{}".format(x, y))