n = float(input())

m = [n , 1]
n_s = format(m[0], '.8f')

for i in range(8):
    if int(n_s[-(i + 1)]) == 0:
        continue
    k = 10 / int(n_s[-(i + 1)])
    if not isinstance(k, int):
        k = 10
    m = [k * m[0], k * m[1]]
    n_s = format(m[0], '.8f')

print(str(int(m[0])) + '/' + str(m[1]))