A and B work together to complete a job. Due to the good cooperation, A's work efficiency is increased by (1/5) compared with that of doing it alone, and B's work efficiency is increased by (1/8) compared with that of doing it alone. A and B work together 8 hours to complete the work. If A takes 12 hours to do it alone, how many hours does B need to do it alone?
甲、乙一起完成一项工作，由于配合得好，甲的工作效率比单独做时提高了(1/5)，乙的工作效率比单独做时提高了(1/8)，甲、乙一起做8小时完成了这项工作．如果甲单独做需要12小时，那么乙单独做需要几小时？
<gadget id="calculator">1 / 40</gadget>
<output>1/40 = around 0.025</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 + (1/8)</gadget>
<output>9/8 = around 1.125</output>

<gadget id="calculator">(1/40) / (9/8)</gadget>
<output>1/45 = around 0.022222</output>

<gadget id="calculator">1 / (1/45)</gadget>
<output>45</output>

<result>45</result>