To produce a batch of zero-priced parts, the original plan was to produce 60 parts per hour, and it was completed in 24 hours. The actual production per hour was 20% more than planned. How many hours did it take to complete this batch of parts?
生产一批零价，原计划每小时生产60个，24小时完成，实际每小时比计划多生产20%，实际几小时完成这批零件？
<gadget id="calculator">60 * 24</gadget>
<output>1_440</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">60 * (1/5)</gadget>
<output>12</output>

<gadget id="calculator">60 + 12</gadget>
<output>72</output>

<gadget id="calculator">1_440 / 72</gadget>
<output>20</output>

<result>20</result>