The outer packaging of the feeding bottle is marked with the words "net content 200ml". If 4L of bulk milk is put into this feeding bottle, how many bottles can be filled in total?
奶瓶外包装上注明"净含量200ml"字样，4L散装牛奶装到这种奶瓶，一共可以装多少瓶？
<gadget id="calculator">4 * 1_000</gadget>
<output>4_000</output>

<gadget id="calculator">4_000 / 200</gadget>
<output>20</output>

<result>20</result>