For a project, A works alone for 3 days, and then cooperates with B for 6 days, so that half of the whole project is completed. It is known that the ratio of work efficiency between A and B is 4:3. How many days will it take for B to do this job alone? to complete?
一项工程，甲先单独做3天，然后与乙合作6天，这样才完成全工程的一半，已知甲、乙工作效率的比是4：3，这件工作乙单独做，需要多少天才能完成？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">4 / 3</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">(4/3) * 3</gadget>
<output>4</output>

<gadget id="calculator">(4/3) * 6</gadget>
<output>8</output>

<gadget id="calculator">4 + 8 + 6</gadget>
<output>18</output>

<gadget id="calculator">(1/2) / 18</gadget>
<output>1/36 = around 0.027778</output>

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

<result>36</result>