Not so tough

Algebra Level 4

\[\left(1 + \frac{1}{3}\right)\times \left(1 + \frac{1}{3^2}\right) \times \left(1 + \frac{1}{3^4}\right) \times \left(1 + \frac {1}{3^8}\right) \times \left(1 + \frac{1}{3^{16}}\right) \times \cdots = \ ? \ \]