14. The first term of the sequence $\left\{a_{n}\right\}$ is 2, the sum of the first $n$ terms is $S_{n}$, and $\left\{S_{n}\right\}$ is a geometric sequence with a common ratio of $\frac{1}{3}$.
(1) Find the general formula for the sequence $\left\{a_{n}\right\}$;
(2) Let $b_{n}=a_{n} S_{n}$, find the sum of all terms of the sequence $\left\{S_{n}\right\}$.