One pan can hold 2 pancakes, and it takes 2 minutes to cook one pancake (1 minute for the front and 1 minute for the reverse side), but how many minutes does it take to fry 5 pancakes?
一个锅能放2个饼，煎熟一个饼需2分钟(正、反面各1分钟)，煎5个饼至少要用多少分钟．
<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<result>5</result>