A fairy tale book has 160 pages, and Zhang Shan has already read it (2/5). How many pages are left unread?
一本童话书有160页，张山已经读了(2/5)．还有多少页没读？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">160 * (3/5)</gadget>
<output>96</output>

<result>96</result>