If it takes 2 minutes to cook one side of cake, and only 2 cakes can be placed in the pot at the same time, how many minutes will it take to cook 3 cakes?
如果烙熟一面饼需要2分钟，锅里只能同时放2张饼，烙熟3张饼需要多少分钟．
<gadget id="calculator">2 + 2 + 2</gadget>
<output>6</output>

<result>6</result>