from fractions import Fraction
x = input()
if '.' in x:
    t = x.index('.')
    if float(x).is_integer():
        print(x[:t] + '/1')
    else:
        ans = Fraction(x)
        print(ans)
elif float(x).is_integer():
    print(x + '/1')
else:
    ans = Fraction(x)
    print(ans)