The frying pan can only fry 2 eggs at a time. It takes 2 minutes to fry 1 egg (1 minute on each side), and how many minutes is needed to fry 3 eggs.
平底锅一次只能煎2个鸡蛋，煎1个鸡蛋需要2分钟(每面1分钟)，煎3个鸡蛋只少需要多少分钟．
<gadget id="calculator">1 * 3</gadget>
<output>3</output>

<result>3</result>