On a runway of 250 meters, how many laps is 1 kilometer.
250米一圈的跑道，跑多少圈是1千米．
<gadget id="calculator">1_000 / 250</gadget>
<output>4</output>

<gadget id="calculator">1 * 4</gadget>
<output>4</output>

<result>4</result>