A salt processing factory packs a batch of salt. If each bag contains 250 grams, 120 bags are needed to fill it all. Now it is required to pack 600 grams per bag, how many bags can be filled? (Solve with ratio)
食盐加工厂包装一批盐，如果每袋装250克，需120袋才能装完．现在要求每袋装600克，需要多少袋可以装完？(用比例解)
<gadget id="calculator">250 * 120</gadget>
<output>30_000</output>

<gadget id="calculator">30_000 / 600</gadget>
<output>50</output>

<result>50</result>