To process a batch of auto parts, the original plan is to process 200 per day, and the task will be completed in 15 days. Actually processed 250 per day. In this way, the task was completed a few days earlier than the original plan?
要加工一批汽车配件，原计划每天加工200个，15天完成任务．实际每天加工了250个．这样比原计划提前几天完成了任务？
<gadget id="calculator">15 / 250</gadget>
<output>3/50 = around 0.06</output>

<gadget id="calculator">200 * (3/50)</gadget>
<output>12</output>

<gadget id="calculator">15 - 12</gadget>
<output>3</output>

<result>3</result>