from math import gcd

s = input()
if '.' not in s:
    print(f"{s}/1")
    exit()
a, b = map(int, s.split('.'))
digit = len(str(b))

a = a * pow(10, digit) + b
b = pow(10, digit)
gcd_ab = gcd(a, b)
a //= gcd_ab
b //= gcd_ab
print(f"{a}/{b}")