A circular runway is 400 meters long, Xiao Ming ran 5 laps, how many kilometers did he run in total?
一个环形跑道全长400米，小明跑了5圈，一共跑了多少千米．
<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>