The circle of the circular track is 800 meters, Xiao Ming ran 5 laps, how many kilometers did he run in total?
环形跑道一圈800米，小明跑了5圈，共跑了多少千米．
<gadget id="calculator">5 / 1_000</gadget>
<output>1/200 = around 0.005</output>

<gadget id="calculator">800 * (1/200)</gadget>
<output>4</output>

<result>4</result>