Master Wang processed a batch of parts and processed 20% of them in 5 hours. According to this calculation, how many hours will it take to complete the task? (answer in multiple ways)
王师傅加工一批零件，5小时加工了20%．照这样计算，完成任务一共要多少小时？(用多种方法解答)
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) / 5</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">1 / (1/25)</gadget>
<output>25</output>

<result>25</result>