Xiaojun uses a frying pan for pancakes. This pan can hold 2 pancakes at the same time. It takes 4 minutes to fry one pancake (2 minutes each for the front and back sides). How many minutes does it take for Xiaojun to fry 6 pancakes at least.
小军用平底锅煎饼，这只锅同时能放2个大饼，煎1个要4分钟(正、反面各需2分钟)，小军煎6个饼最少需要多少分钟．
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 * 4</gadget>
<output>12</output>

<result>12</result>