One job, A completes (1/8) of all the work every day, B completes (1/12) of all the work every day, how much of the whole work can be completed by two people working together for 2 days.
一件工作，甲每天完成全部工作的(1/8)，乙每天完成全部工作的(1/12)，两人合作2天，能完成全部工作的多少．
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">(1/8) + (1/12)</gadget>
<output>5/24 = around 0.208333</output>

<gadget id="calculator">(5/24) * 2</gadget>
<output>5/12 = around 0.416667</output>

<result>5/12 = around 0.416667</result>