from math import gcd
X = input().split(".")
if len(X) == 1:
    print(str(X[0])+"/1")
    exit()
a = int(X[1])
b = 10 ** len(X[1])
g = gcd(a,b)
a //= g
b //= g
a += int(X[0]) * b
print(str(a)+"/"+str(b))