One lap of the track is 400 meters long. Xiao Ming ran 5 laps. How many kilometers did he run in total?
跑道一圈长400米，小明跑了5圈，他一共跑了几千米？
<gadget id="calculator">5 / 1_000</gadget>
<output>1/200 = around 0.005</output>

<gadget id="calculator">400 * (1/200)</gadget>
<output>2</output>

<result>2</result>