One lap of the school runway is 400 meters, and the number of laps is exactly 2 kilometers.
学校跑道一圈是400米，跑多少圈正好是2千米．
<gadget id="calculator">2 * 1_000</gadget>
<output>2_000</output>

<gadget id="calculator">2_000 / 400</gadget>
<output>5</output>

<result>5</result>