The distance between Xiaoxin’s home and school is 320 meters. After walking 80 meters to school one day, he found that he had forgotten his Chinese books, and returned home to get the Chinese books, and then went to school. How many meters did he walk from home to school?
小新家与学校相距320米，一天他上学走了80米之后，发现语文书忘带了，又返回家中去拿语文书，然后再到学校去，他从家到学校一共走了多少米？
<gadget id="calculator">80 * 2</gadget>
<output>160</output>

<gadget id="calculator">160 + 320</gadget>
<output>480</output>

<result>480</result>