X = float(input())
S = int(X * 10 ** 8)
B = 10 ** 8

import sys
if S == 0:
    print(0,"/",1,sep = "")

def gcd(a,b):
    while True:
        r = a % b
        a = b
        b = r
        if r == 0:
            return a
d = gcd(S,B)
print(S // d,'/',B // d,sep = "")