Only two pancakes can be fried on one pan, and it takes 4 minutes to fry one pancake (2 minutes each for the front and back sides). So, how many minutes does it take to fry 3 pancakes at least
一只平底锅上只能煎两个饼，用它煎一个饼需要4分钟(正反面各2分钟)．那么，煎3个饼至少需要多少分钟
<gadget id="calculator">2 + 2 + 2</gadget>
<output>6</output>

<result>6</result>