A project team completes one project every day (2/9). In this way, how many days will it take to complete the project.
某工程队每天完成一项工程的(2/9)．照这样，完成这项工程要多少天．
<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">1 / (2/9)</gadget>
<output>9/2 = around 4.5</output>

<result>9/2 = around 4.5</result>