In a family of three, the average age of every two people plus the age of the remaining one is 47, 61, and 60 respectively, so what is the difference between the oldest and youngest age among these three people
在一家三口人中，每两个人的平均年龄加上余下一人的年龄分别得到47，61，60，那么这三个人中最大年龄与最小年龄的差是多少
<gadget id="calculator">38 - 10</gadget>
<output>28</output>

<result>28</result>