Xiaoli's home is 800 meters away from the school. In the morning, she went to school from home, and when she was halfway through the total distance, she found that she had forgotten to bring her math books. So she went home to get the book and went to school again. How many meters did Xiaoli walk to school?
小丽家离学校800米．早上她从家去学校上学，走到总路程的一半时，发现忘记带数学书．于是她又回家拿书，再去学校．小丽上学一共走了多少米？
<gadget id="calculator">800 * 2</gadget>
<output>1_600</output>

<result>1_600</result>