project is to be done alone. A will complete it in 10 days, and B will complete it in 15 days. Now it needs to be completed in another 8 days. Therefore, two teams need to cooperate. However, due to the influence of the venue, A’s work efficiency will be reduced by 20%, and B’s efficiency will be reduced. 10%. Scientific arrangements can make the number of days for the two teams to cooperate as few as possible while completing the project on schedule, so how many days should the two teams cooperate at least?
一项工程，单独做，甲10天完成，乙15天完成，现需要再8天完工，故需两队合作，但合作时因场地影响，甲的工作效率降低20%，乙的效率要降低10%．科学安排就可以在按期完工的情况下，使两队合作的天数尽可能少，那么两队至少合作多少天？
<gadget id="calculator">2 / 25</gadget>
<output>2/25 = around 0.08</output>

<gadget id="calculator">(2/25) * 8</gadget>
<output>16/25 = around 0.64</output>

<gadget id="calculator">1 - (16/25)</gadget>
<output>9/25 = around 0.36</output>

<gadget id="calculator">3 / 50</gadget>
<output>3/50 = around 0.06</output>

<gadget id="calculator">(3/50) - (2/25)</gadget>
<output>-1/50 = around -0.02</output>

<gadget id="calculator">(2/25) + (-1/50)</gadget>
<output>3/50 = around 0.06</output>

<gadget id="calculator">(9/25) / (3/50)</gadget>
<output>6</output>

<result>6</result>