Xiaohong's home is 450 meters away from the school. If she goes home for lunch, how many meters does she have to walk to and from school every day?
小红家距学校450米，如果中午回家吃饭，她每天上、下学一共要走多少米？
<gadget id="calculator">450 * 4</gadget>
<output>1_800</output>

<result>1_800</result>