Wang Li had to walk 1,700 meters from home to school. After walking 400 meters, he went home to pick up the pencil case. How many meters did he walk from home to school?
王力从家到学校要走1700米，他走了400米后又回家取笔盒，这样他从家到学校共走了多少米．
<gadget id="calculator">400 + 400 + 1_700</gadget>
<output>2_500</output>

<result>2_500</result>