6. (3 points) At 2 o'clock, the clock strikes 2 times, and it takes 2 seconds to finish. At 12 o'clock, it strikes 12 times, $\qquad$ seconds to finish.
【Answer】Solution: According to the analysis, we have
$$
\begin{array}{l}
2 \div(2-1) \times(12-1), \\
=2 \times 11, \\
=22 \text { (seconds); }
\end{array}
$$

Answer: At 12 o'clock, it strikes 12 times, and it takes 22 seconds to complete.
Therefore, the answer is: 22.