import math
X = input()

if '.' not in X:
    exit(print('{}/1'.format(X)))

seisu, shosu = X.split('.')
bumbo = 10**len(shosu)
seisu = int(seisu)
shosu = int(shosu)

# 1.333
# keta = 10**3
# shosu = 333
g = math.gcd(bumbo, shosu)
bumbo //= g
shosu //= g

ans = [str(seisu * bumbo + shosu), '/', str(bumbo)]
print(''.join(ans))