Xiaojun is 1,600 meters from his home to the Children's Palace. One day he set off from home to the Children's Palace, walked 400 meters and went home to pick up his things, and then went to the Children's Palace. How many meters did he walk in total?
小军从家到少年宫有1600米．一天他从家出发到少年宫去，走出400米后又回家取东西，然后再到少年宫．他一共走了多少米？
<gadget id="calculator">400 + 400 + 1_600</gadget>
<output>2_400</output>

<result>2_400</result>