A swimming pool is 50 meters long. If you swim 1 kilometer, how many such lengths will you need to swim?
一个游泳池长50米，如果游1千米，要游多少个这样的长度．
<gadget id="calculator">1_000 / 50</gadget>
<output>20</output>

<gadget id="calculator">1 * 20</gadget>
<output>20</output>

<result>20</result>