A factory plans to process a batch of parts. If 20 parts are processed every day, it can be completed in 18 days. In fact, 96 parts are processed in 4 days. According to this calculation, how many days can the task be completed?
某工厂计划加工一批零件，如果每天加工20个，18天可以完成，实际4天加工了96个，照这样计算，几天可以完成任务？
<gadget id="calculator">20 * 18</gadget>
<output>360</output>

<gadget id="calculator">96 / 4</gadget>
<output>24</output>

<gadget id="calculator">360 / 24</gadget>
<output>15</output>

<result>15</result>