It takes A alone 8 days to complete a job, and B alone takes 12 days to complete the job. How much is A and B working together to complete the job in 2 days?
完成一项工作，甲单独完成要8天，乙单独完成要12天，甲、乙合做2天完成这项工作的多少
<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>