If the average age of 6 people is 25 years old, and the youngest is 20 years old, and the ages of the six people are all different, then how old is the oldest person?
如果6个人平均年龄是25岁，其中最小的20岁，且六人的年龄都不相同，那么年龄最大的人最大是几岁？
<gadget id="calculator">25 * 6</gadget>
<output>150</output>

<gadget id="calculator">20 + 21 + 22 + 23 + 24</gadget>
<output>110</output>

<gadget id="calculator">150 - 110</gadget>
<output>40</output>

<result>40</result>