Xiao Ming runs 2 laps on the track every day, 400 meters per lap, how many meters does he run in a week?
小明在跑道上每天跑2圈，每圈400米，他一星期跑多少米？
<gadget id="calculator">400 * 2 * 7</gadget>
<output>5_600</output>

<result>5_600</result>