If you use a pan to cook pancakes, you can fry 2 cakes at the same time. It takes 2 minutes to fry one side, and how many minutes is the minimum time to fry 3 cakes.
用一只平底锅煎饼，每次能同时煎2张饼，煎一面需要2分钟，煎3张饼至少需要多少分钟．
<gadget id="calculator">2 * 3</gadget>
<output>6</output>

<result>6</result>