It takes 20 days for a project to be completed by teams A and B. Now, team A works for 5 days, and then team B works for 2 days. A total of (1/5) of the project is completed. How many days will it take if the project is completed by Team A alone?
一项工程，甲、乙两队合做要20天完成，现先由甲队工作5天，然后再由乙队工作2天，共完成这项工程的(1/5)．如果这项工程由甲队单独完成，要多少天？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<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">(1/5) - (1/10)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/10) / 3</gadget>
<output>1/30 = around 0.033333</output>

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

<result>30</result>