If the average age of the four people is 23 and none of the four is younger than 18, what is the likely age of the oldest of the four?
如果四人的平均年龄是23岁，四个人中没有小于18岁的，那么四个人中年龄最大的可能是多少岁？
<gadget id="calculator">23 * 4</gadget>
<output>92</output>

<gadget id="calculator">18 * 3</gadget>
<output>54</output>

<gadget id="calculator">92 - 54</gadget>
<output>38</output>

<result>38</result>