x = [str(i) for i in input().split(".")]

def gcd(a,b):
  #print(a,b)
  if a*b == 0:
    return 1
  if b>a:
    a,b=b,a
  if a==b:
    return max(a,1)
  elif a%b==0:
    return b
  else:
    return gcd(b,a%b)

if len(x) == 1:
  print(str(x[0])+"/1")
else:
  a = int(x[0])
  t = x[1]
  b = 10**len(t)
  c = b*a+int(t)
  d = gcd(b,c)
  b //= d
  c //= d
  print(str(c)+"/"+str(b))