x = input()
if "." in x:
    a, b = x.split(".")
    bunshi = 0
    bunbo = 0
    bunshi = int(a) * pow(10, len(b)) + int(b)
    bunbo = pow(10, len(b))
else:
    print(x + "/1")
    exit()

# 素因数分解
def prime_factor(n):
    # (素因数, 数)のリストで出てくる
    d = {}
    for i in range(2, int(n ** 0.5) + 1):
        while n % i == 0:
            if i in d:
                d[i] += 1
            else:
                d[i] = 1
            n //= i
    if n != 1:
        if n in d:
            d[n] += 1
        else:
            d[n] = 1
    return d


a = prime_factor(bunbo)
b = prime_factor(bunshi)

for key in a.keys():
    if key in b:
        n1 = b[key]
        n2 = a[key]
        if n1 > n2:
            bunshi //= pow(key, n2)
            bunbo //= pow(key, n2)
        else:
            bunbo //= pow(key, n1)
            bunshi //= pow(key, n1)
print(f"{bunshi}/{bunbo}")