from math import gcd
x = input()

n = len(x)

dot = n-1
for i in range(n):
    if x[i] == '.':
        dot = i

s = int(x.replace('.', ''))
b = 10 ** (n - 1 - dot)

g = gcd(s, b)

s //= g
b //= g

print(str(s)+'/'+str(b))