Master Wang planned to produce 600 parts, but actually completed the plan (2/5) in 8 days. How many days did it actually take to complete the plan?
王师傅计划生产600个零件，实际8天完成计划的(2/5)，实际用多少天完成计划？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/5) / 8</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">1 / (1/20)</gadget>
<output>20</output>

<result>20</result>