If (1/6) of a project is completed in 3 days, then how many days to complete the project can be listed as
如果3天完成一项工程的(1/6)，那么多少天完成这项工程，可以列式为多少
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(1/6) / 3</gadget>
<output>1/18 = around 0.055556</output>

<gadget id="calculator">1 / (1/18)</gadget>
<output>18</output>

<result>18</result>