and B work together to complete a project in 12 days. If A is asked to do 8 days first, the remaining task will be completed by B alone in 11 days. How many days will it take B to complete this task alone?
甲、乙两人合作完成一工程12天完成，如果让甲先做8天，剩下的任务由乙单独完成要11天时间，乙单独完成这项任务要多少天？
<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">(1/12) * 8</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 - (2/3)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">11 - 8</gadget>
<output>3</output>

<gadget id="calculator">(1/3) / 3</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">1 / (1/9)</gadget>
<output>9</output>

<result>9</result>