Only two pancakes can be fried on one pan, and it takes 2 minutes to fry one pancake (1 minute for the front and 1 minute for the reverse side), how many minutes does it take to fry 3 pancakes?
一只平锅上只能煎两只饼，用它煎一只饼需要2分钟(正面、反面各1分钟)，煎3只饼需要多少分钟．
<gadget id="calculator">1 + 1 + 1</gadget>
<output>3</output>

<result>3</result>