When frying eggs in a pan, both sides must be fried. You can only fry two eggs at a time. If it takes 2 minutes to fry one side, how many minutes will it take to fry 4 eggs at least?
用平底锅煎鸡蛋，两面都要煎，每次只能煎两个，如果煎一面要2分钟，煎4个鸡蛋最少要用多少分钟．
<gadget id="calculator">2 * 4</gadget>
<output>8</output>

<result>8</result>