Xiaohong's home is 520 meters away from the school. Today she went to school. After walking 230 meters from home to school, she found that she forgot her homework and went home to get it. How many meters did she walk to school this time?
小红家离学校520米，今天她去上学，从家向学校走出230米后，发现忘带作业本了，又回家去取，这一次她上学一共走了多少米？
<gadget id="calculator">230 * 2</gadget>
<output>460</output>

<gadget id="calculator">460 + 520</gadget>
<output>980</output>

<result>980</result>