Each bottle of cod liver oil drops 10 ml, 5 bottles per box. Now there is 0.4 liters of cod liver oil, how many boxes can it hold?
每瓶鱼肝油滴剂10毫升，每盒装5瓶．现在有鱼肝油0.4升，可以装多少盒？
<gadget id="calculator">0.4 * 1_000</gadget>
<output>400</output>

<gadget id="calculator">400 / 10 / 5</gadget>
<output>8</output>

<result>8</result>