Xiao Ming reads a story book, and has already read (5/9) of the whole book, how much of it is left unread?
小明看一本故事书，已经看了全书的(5/9)，还剩下几分之几没有看？
<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">1 - (5/9)</gadget>
<output>4/9 = around 0.444444</output>

<result>4/9 = around 0.444444</result>