A pan can only bake two cakes at a time. If it takes 2 minutes to bake one cake (1 minute for the front and back), then how many minutes will it take to bake 5 cakes?
一只平底锅，每次只能烙两张饼，如果烙好一张要2分钟，(正反各要1分钟)，那么要烙5张饼至少要多少分钟．
<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<result>5</result>