A book has 80 pages, Feifei has read (3/8) of it, how much of the book is left unread?
一本书有80页，飞飞看了它的(3/8)，还剩下全书的几分之几没看？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">1 - (3/8)</gadget>
<output>5/8 = around 0.625</output>

<result>5/8 = around 0.625</result>