import math

x = input()

if not '.' in x:
    print(x + '/1')
    exit()

p = x.find('.')
h = x[:p]
t = x[p + 1:]
num = int(h + t)
den = 10 ** len(t)
g = math.gcd(num, den)
num //= g
den //= g

print(str(num) + '/' + str(den))