How many bottles can be filled if a large bottle of 50 liters of medicine is divided into small bottles of 20 ml?
把50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">50 * 1_000</gadget>
<output>50_000</output>

<gadget id="calculator">50_000 / 20</gadget>
<output>2_500</output>

<result>2_500</result>