The engineering team completes 20% of a project in 3 hours, how many hours will it take to complete the project
工程队3小时完成一项工程的20%，全部完成这项工程需要多少小时
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">3 / (1/5)</gadget>
<output>15</output>

<result>15</result>