mobile phone factory originally planned to produce 80 mobile phones per day and complete the task in 25 days. Actually produce 20 more mobile phones every day, how many days will it actually take to complete the task?
某手机厂原计划每天生产手机80部，25天完成任务．实际每天多生产手机20部，实际用几天完成任务？
<gadget id="calculator">80 * 25</gadget>
<output>2_000</output>

<gadget id="calculator">80 + 20</gadget>
<output>100</output>

<gadget id="calculator">2_000 / 100</gadget>
<output>20</output>

<result>20</result>