For a job, A can complete the job in 5 days alone (5/6), how many days will it take for A to do this job alone?
一项工作，甲单独做5天完成工作的(5/6)，甲单独做这项工作要多少天．
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">(5/6) / 5</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 / (1/6)</gadget>
<output>6</output>

<result>6</result>