How many bottles can be filled if a large bottle of 5 liters of medicine is divided into small bottles of 20 ml?
把5升一大瓶的药水，分装在20毫升的小瓶中，可以装多少瓶．
<gadget id="calculator">5 * 1_000</gadget>
<output>5_000</output>

<gadget id="calculator">5_000 / 20</gadget>
<output>250</output>

<result>250</result>