Use a pan to bake pancakes, and you can put two cakes at the same time. If it takes 3 minutes to bake one side, how many minutes will it take to bake 11 cakes?
用一只平底锅烙饼，每次能同时放两块饼，如果烙一面需要3分钟，烙11块饼需要多少分钟．
<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>