Xiao Ming reads a 480-page book and has read 60% of it. How many pages are left?
小明看一本480页的书，已经看了60%，还剩下多少页没有看？
<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">480 * (2/5)</gadget>
<output>192</output>

<result>192</result>