Xiao Li and Xiao Zhu cooperate to complete a project. Due to the good cooperation, Xiao Li's work efficiency is increased (1/10) compared with that of alone, and Xiao Zhu's work efficiency is increased (1/5) compared with that of alone. 6 days of cooperation to complete the task. If it takes Xiao Li 11 days to do it alone, how many days does it take Xiao Zhu to do it alone?
小李和小朱合作完成一项工程，由于配合得好，小李的工作效率比单独做时提高(1/10)，小朱的工作效率比单独做时提高(1/5)，两人合作6天完成任务．如果小李单独做要11天，那么小朱单独做要多少天？
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 / 11</gadget>
<output>1/11 = around 0.090909</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 + (1/10)</gadget>
<output>11/10 = around 1.1</output>

<gadget id="calculator">(1/11) * (11/10)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/6) - (1/10)</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">(1/15) / (6/5)</gadget>
<output>1/18 = around 0.055556</output>

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

<result>18</result>