n = float(input())

m = [n , 1]
n_s = str(n)
l = len(n_s.split('.')[1])

while int(m[0]) != m[0]:
    k = 10 // int(n_s[-1])
    m = [k * m[0], k * m[1]]
    n_s = str(m[0])
    
print(str(int(m[0])) + '/' + str(m[1]))