Qiangqiang ran 5 laps along a square runway with a side length of 50 meters, how many kilometers did he run
强强沿着边长50米的正方形跑道跑了5圈，跑了多少千米
<gadget id="calculator">50 * 4 * 5</gadget>
<output>1_000</output>

<gadget id="calculator">1_000 / 1_000</gadget>
<output>1</output>

<result>1</result>