Put two cakes at most in the pan at a time, one cake needs to be baked on both sides, it takes 2 minutes to cook one side, and how many minutes is the minimum time to bake 5 cakes.
平底锅中每次最多放两张饼，一张饼要烙两面，烙熟一面要2分钟，烙熟5张饼最少要多少分钟．
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">2 * 3</gadget>
<output>6</output>

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

<result>10</result>