A project is completed in 8 days by team A and 12 days by team B. If the two teams cooperate for 3 days, how much of the project is left (fill in the marks)
一项工程，甲队做8天完成，乙队做12天完成，如果两队合作3天，还剩下这项工程的多少(填分数)
<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) * 3</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">1 - (5/8)</gadget>
<output>3/8 = around 0.375</output>

<result>3/8 = around 0.375</result>