If the average age of four people is 25 years old, none of them is younger than 17 years old, and the ages of the four people are different, what is the age of the oldest one?
如果四个人的平均年龄是25岁，其中没有小于17岁的，且四人的年龄都不相同，那么最大的是多少岁．
<gadget id="calculator">25 * 4</gadget>
<output>100</output>

<gadget id="calculator">100 - 17 - 18 - 19</gadget>
<output>46</output>

<result>46</result>