def factorization(n):
    retlist = []
    tmp = n
    for i in range(2, int(-(-n**0.5//1))+1):
        if tmp % i == 0:
            cnt = 0
            while tmp % i == 0:
                cnt += 1
                tmp //= i
            retlist.append([i, cnt])

    if tmp != 1:
        retlist.append([tmp, 1])

    if retlist == []:
        retlist.append([n, 1])

    return retlist


s = input()
a = ""
b = ""
# print(s.find("."))
if s.find(".") != -1:
    a, b = s.split(".")
else:
    print(s+"/1")
    exit(0)

d = len(b)
ch = ""
f = False
for bb in b:
    if bb != "0":
        f = True
    if f:
        ch += bb
if ch == "":
    ch = 0
else:
    ch = int(ch)

ch += int(a)*(10**d)
dch = factorization(ch)
dmo = factorization(10**d)
div = []
for num_ch, val_ch in dch:
    for num_mo, val_mo in dmo:
        if num_ch == num_mo:
            div.append((num_ch, min(val_ch, val_mo)))
mo = 10**d
# ch = int(ch)+int(a)*(10**d)
for dn, dv in div:
    mo //= dn**dv
    ch //= dn**dv

print(str(ch)+"/"+str(mo))