import math
x = input()

s = 0
check = False
b = 1
for i in range(len(x)):
    s *= 10
    if x[i] == ".":
        check = True
        b = 10**(len(x)-i-1)
    else:
        s += int(x[i])


g = math.gcd(s,b)
s //= g
b //= g
print("{}/{}".format(s,b))