For a batch of bottled beverages, if each box contains 24 bottles, 30 boxes are needed. How many boxes are needed if each box contains 18 bottles? (use ratio to solve)
一批瓶装饮料，如果每箱装24瓶，需要30个包装箱．如果每箱装18瓶，需要多少个包装箱？(用比例来解)
<gadget id="calculator">24 * 30</gadget>
<output>720</output>

<gadget id="calculator">720 / 18</gadget>
<output>40</output>

<result>40</result>