def gcd(a,b):
    if b == 0:
        return a
    else:
        return gcd(b,a%b)

X = float(input())

if X == 0:
    print("0/1")
    exit()

for i in range(1,10**8+1):
    X2 = X*i
    if int(X2) != 0 and X2 == int(X2):
        div = gcd(X2,i)
        print(str(int(X2//div))+"/"+str(int(i//div)))
        break