A manuscript, Xiaoli completed it (1/5) in 3 days, what percentage of the manuscript was completed on average every day? How many days will it take to complete this manuscript?
一篇书稿，小李3天完成它的(1/5)，平均每天完成这篇书稿的几分之几？完成这篇书稿共要多少天？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) / 3</gadget>
<output>1/15 = around 0.066667</output>

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

<result>15</result>