It takes 20 days for team A to complete a project alone, and team B completes (1/16) of the whole project every day. After team A works alone for 2 days, team B joins in and cooperates with team A because it needs to be completed ahead of schedule. How many days will it take to complete the project? ?
一项工程，甲队单独完成需20天，乙队每天完成整个工程的(1/16)，甲队独做2天后，因要提前完工，乙队加入和甲队合作，还需多少天完成？
<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">(1/20) * 2</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">1 / 16</gadget>
<output>1/16 = around 0.0625</output>

<gadget id="calculator">(1/20) + (1/16)</gadget>
<output>9/80 = around 0.1125</output>

<gadget id="calculator">(9/10) / (9/80)</gadget>
<output>8</output>

<result>8</result>