Master Wang processed a batch of parts and completed (2/5) of this batch of parts in 6 days. According to this calculation, how many days will be left to make?
王师傅加工一批零件，6天完成了这批零件的(2/5)，照这样计算，剩下的还要做多少天？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(2/5) / 6</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">(3/5) / (1/15)</gadget>
<output>9</output>

<result>9</result>