A factory processes 2,100 parts, and plans to process 75 parts per day on average. After 6 days, the technology improves, and an average of 150 parts are processed per day. How many days earlier than the original plan can the task be completed?
某厂加工零件2100个，计划平均每天加工75个，6天后改进了技术，平均每天加工150个，这样比原计划提前几天完成任务？
<gadget id="calculator">2_100 / 75</gadget>
<output>28</output>

<gadget id="calculator">75 * 6</gadget>
<output>450</output>

<gadget id="calculator">2_100 - 450</gadget>
<output>1_650</output>

<gadget id="calculator">1_650 / 150</gadget>
<output>11</output>

<gadget id="calculator">28 - 6 - 11</gadget>
<output>11</output>

<result>11</result>