Xiaofang: I keep exercising and run twice a day. Each lap of the track is 400 meters long. How many meters did Xiaofang run in a week (7 days)?
小芳：我坚持锻炼身体，每天跑两圈．跑道每圈长400米，小芳一个星期(7天)一共跑了多少米？
<gadget id="calculator">400 * 2 * 7</gadget>
<output>5_600</output>

<result>5_600</result>