seq = input()

n = len(seq) - 1
numerator = 0
denominator = 2 ** n
for i in range(n):
    digit = int(seq[i])
    added = 3 ** (n - i) * digit * (2 ** i)
    numerator += added
numerator += denominator * int(seq[-1])

def gcd(a, b):
    while b != 0:
        a, b = b, a % b
    return a

mygcd = gcd(numerator, denominator)
numerator /= mygcd
denominator /= mygcd

numerator, denominator = int(numerator), int(denominator)
wholes = 0
if denominator != 1:
    print(f"{numerator // denominator} {numerator % denominator}/{denominator}")
else:
    print(numerator)