Put eggs in an empty basket. The number of eggs in the basket doubles every minute. After 12 minutes, the basket is just full of eggs. When are the eggs just halfway in the basket?
往一只空篮子里放鸡蛋，篮子里的鸡蛋数每分钟增加1倍，放了12分钟，篮子里刚好放满鸡蛋．什么时候鸡蛋刚好放到半篮？
<gadget id="calculator">12 - 1</gadget>
<output>11</output>

<result>11</result>