A lap of the school playground is 250 meters long. How many kilometers is the total length of Xiaoli running 4 laps?
学校操场一圈长250米，小丽跑了4圈一共是多少千米．
<gadget id="calculator">250 * 4</gadget>
<output>1_000</output>

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

<result>1</result>