x = input()
n = len(x)
p = x.find('.')
if p == -1:
    print(x + '/1')
    exit()
c2 = c5 = n - p - 1
x = int(x.replace('.', ''))
while x % 2 == 0 and c2:
    c2 -= 1
    x //= 2
while x % 5 == 0 and c5:
    c5 -= 1
    x //= 5
print(f'{x}/{2 ** c2 * 5 ** c5}')