project can be completed by team A alone in 30 days, and the work efficiency of team B is (3/5) that of team A. After the two teams cooperate for 10 days, Team A will finish the rest alone. How many days will it take?
一项工程，甲队单独做30天完成，乙队的工作效率是甲队的(3/5)．两队合作10天后，余下的由甲队单独完成，还需要多少天？
<gadget id="calculator">1 / 30</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(1/30) * (3/5)</gadget>
<output>1/50 = around 0.02</output>

<gadget id="calculator">(1/30) + (1/50)</gadget>
<output>4/75 = around 0.053333</output>

<gadget id="calculator">(4/75) * 10</gadget>
<output>8/15 = around 0.533333</output>

<gadget id="calculator">1 - (8/15)</gadget>
<output>7/15 = around 0.466667</output>

<gadget id="calculator">(7/15) / (1/30)</gadget>
<output>14</output>

<result>14</result>