Use a pan that can hold two cakes at the same time to bake 11 cakes. It takes 3 minutes to bake each side, and both sides must be baked. How many minutes is the minimum time to bake.
用一口同时可以放两张饼的锅烙11张饼，每烙一面要3分钟，两面都要烙，烙完最少要多少分钟．
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">3 * 2 * 4</gadget>
<output>24</output>

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

<gadget id="calculator">24 + 9</gadget>
<output>33</output>

<result>33</result>