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, and the three work together for another 4 days to complete the whole work (1/3) , after another 8 days, all the work (5/6) is completed, if the rest of the work is completed by C alone, how many days will it take?
一件工作，若由甲单独做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，三人再一起工作4天，完成全部工作的(1/3)，又过了8天，完成了全部工作的(5/6)，若余下的工作由丙单独完成，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 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/24) * (1/2)</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>