Xiaohong's home is 500 meters away from the school. When she walked 215 meters from her home one day, she found that she forgot to bring her math books. She went back to get the books, and then went to school. How many meters did Xiaohong walk to school that day?
小红家离学校500米，一天从家走到215米时发现忘了带数学书，又返回去拿书，再到学校．这天小红上学共走了多少米．
<gadget id="calculator">2 * 215</gadget>
<output>430</output>

<gadget id="calculator">430 + 500</gadget>
<output>930</output>

<result>930</result>