A, B, and C are going to explore the desert. They walk 20 kilometers to the depths of the desert every day. It is known that each person can carry food and water for one person at most for 24 days. If it is not allowed to store some food on the way. So how far can one of them go deep into the desert? (The last three are required to return to the starting point)
甲、乙、丙三人要到沙漠中去探险，他们每天向沙漠深处走20千米，已知每人最多可以携带一个人24天的食物和水．如果不准将部分食物存放于途中．那么其中一人最远可以深入沙漠多少千米？(要求最后三人返回出发点)
<gadget id="calculator">24 - 8</gadget>
<output>16</output>

<gadget id="calculator">16 + 8 + 8</gadget>
<output>32</output>

<gadget id="calculator">32 - 8</gadget>
<output>24</output>

<gadget id="calculator">24 / 2</gadget>
<output>12</output>

<gadget id="calculator">12 + 8</gadget>
<output>20</output>

<gadget id="calculator">20 * 20</gadget>
<output>400</output>

<result>400</result>