If A works alone for 72 days to complete a job, now A works for 1 day, B joins in to work together, after 2 days of cooperation, C also works together, the three work for another 4 days, and complete (1/3) of all the work, After another 8 days, all the work was completed (5/6). How many days will it take if C completes the rest of the work alone?
一件工作，若甲单独做72天完成，现在甲做1天后，乙加入一起工作，合作2天后，丙也一起工作，三人再工作4天，完成了全部工作的(1/3)，又过了8天，完成全部工作的(5/6)．若余下的工作让丙单独完成还需要几天？
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

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

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(5/6) - (1/3)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) / 8</gadget>
<output>1/16 = around 0.0625</output>

<gadget id="calculator">1 / 72</gadget>
<output>1/72 = around 0.013889</output>

<gadget id="calculator">1 / 24</gadget>
<output>1/24 = around 0.041667</output>

<gadget id="calculator">(1/24) / 2</gadget>
<output>1/48 = around 0.020833</output>

<gadget id="calculator">(1/16) - (1/72) - (1/48)</gadget>
<output>1/36 = around 0.027778</output>

<gadget id="calculator">(1/6) / (1/36)</gadget>
<output>6</output>

<result>6</result>