A story book has 120 pages, I read (1/3) on the first day, how much of it is left unread?
一本故事书120页，第一天读了(1/3)，还剩几分之几没有读？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<result>2/3 = around 0.666667</result>