If the average age of three people is 22, and no one is younger than 18, what is the possible age of the oldest person?
如果三个人的平均年龄是22岁，且没有小于18岁的，那么最大的人的年龄可能是多少岁．
<gadget id="calculator">22 * 3</gadget>
<output>66</output>

<gadget id="calculator">66 - 18 - 18</gadget>
<output>30</output>

<result>30</result>