A pan can only bake two cakes at most at a time, and it takes 2 minutes to bake one side (both sides must be baked), how many minutes is the minimum time to bake 5 cakes with it.
一只平底锅每次最多只能烙两张饼，烙一面需要2分钟(正反面都要烙)，用它烙5张饼至少要多少分钟．
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

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

<gadget id="calculator">6 + 4</gadget>
<output>10</output>

<result>10</result>