A project team completes a project in 4 days (2/7). According to this calculation, how many days will it take to complete the project?
某工程队4天完成一项工程的(2/7)，照这样计算，完成这项工程一共需要多少天？
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">(2/7) / 4</gadget>
<output>1/14 = around 0.071429</output>

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

<result>14</result>