Xiao Ming uses a pan to fry eggs, and he can fry 2 eggs each time. If it takes 2 minutes to fry 1 egg (1 minute for the front and 1 minute for the back), then how many minutes is the minimum time for frying 9 eggs?
小明用一只平底锅煎蛋，每次能煎2个蛋．如果煎1个蛋要2分钟(正、反面各1分钟)，那么煎9个蛋最少要有多少分钟．
<gadget id="calculator">2 * 3</gadget>
<output>6</output>

<gadget id="calculator">6 + 3</gadget>
<output>9</output>

<result>9</result>