It takes 250 meters to run one lap along the playground. How many laps does dad have to run every day to reach 1 kilometer.
沿操场跑一圈是250米，爸爸每天必须跑多少圈，才能达到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>