Worker Master Li produced a batch of parts and completed 1800 parts in 12 days. At this speed, how many days will it take to complete the production task of 3000 parts? (Solution with proportional knowledge)
工人李师傅生产一批零件，12天完成了1800个，照这样的速度，完成3000个零件的生产任务，还需要多少天？(用比例知识解)
<gadget id="calculator">3_000 - 1_800</gadget>
<output>1_200</output>

<gadget id="calculator">1_800 / 12</gadget>
<output>150</output>

<gadget id="calculator">1_200 / 150</gadget>
<output>8</output>

<result>8</result>