import math
X = input()
if '.' in X:
    seisu, shosu = X.split('.')
    seisu = int(seisu)
    shosu = int(shosu)
else:
    seisu = int(X)
    shosu = 0

bumbo = 10**len(str(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))