The Star Gymnastics Performance Team has designed a contact method for the convenience of communication. Once something happens, the coach will notify the 3 captains at the same time, and then the 3 captains will notify the 3 classmates at the same time, and so on, each of them will notify 3 people at the same time. If it takes 1 minute to notify 3 people at the same time, how many students can be notified in 6 minutes.
星星体操表演队为联络方便，设计了一种联络方式．一旦有事，先由教练同时通知3位队长，这3位队长再分别同时通知3位同学，依此类推，每人再同时通知3个人．如果每同时通知3人共需要1分钟，6分钟可以通知到多少名同学．
<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<gadget id="calculator">9 * 3</gadget>
<output>27</output>

<gadget id="calculator">27 * 3</gadget>
<output>81</output>

<gadget id="calculator">81 * 3</gadget>
<output>243</output>

<gadget id="calculator">243 * 3</gadget>
<output>729</output>

<gadget id="calculator">3 + 9 + 27 + 81 + 243 + 729</gadget>
<output>1_092</output>

<result>1_092</result>