Xiao Ming reads a book, and reads the whole book (4/11) in the first 4 days. At this speed, how many days will it take to read the whole book? (answer with ratio)
小明看一本书，前4天看了全书的(4/11)，以这样的速度，看完全书要多少天？(用比例解答)
<gadget id="calculator">4 / 11</gadget>
<output>4/11 = around 0.363636</output>

<gadget id="calculator">4 / (4/11)</gadget>
<output>11</output>

<result>11</result>