To process a batch of parts, the original plan was to process 360 parts per day, and it took 15 days to complete. In fact, 90 more parts were processed per day. How many days can the task be completed?
加工一批零件，原计划每天加工360个，15天完成，实际每天多加工90个，多少天可以完成任务？
<gadget id="calculator">360 * 15</gadget>
<output>5_400</output>

<gadget id="calculator">360 + 90</gadget>
<output>450</output>

<gadget id="calculator">5_400 / 450</gadget>
<output>12</output>

<result>12</result>