Master Wang processed a batch of parts, and completed (2/3) of the workload in (2/5) hours. According to this calculation, how many hours will it take Master Wang to complete all the tasks?
王师傅加工一批零件，(2/5)小时完成了工作量的(2/3)．照这样计算，王师傅完成全部任务，一共需要多少小时？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/3) / (2/5)</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">1 / (5/3)</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>