Use a pan to make pancakes, only 4 pancakes can be placed at a time, and it takes 4 minutes to cook one pancake (2 minutes for the front and back sides), and at least how many minutes it takes to fry 6 pancakes.
用一只平底锅煎饼，每次只能放4张饼，煎熟一张饼要4分钟(正反面各2分钟)，煎6张饼至少需要多少分钟．
<gadget id="calculator">2 + 2 + 2</gadget>
<output>6</output>

<result>6</result>