Xiaoying reads a 300-page novel and has already read (2/3), how many pages have she not read yet?
小英看一本300页的小说，已经看了(2/3)，还有多少页没有看？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 - (2/3)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">300 * (1/3)</gadget>
<output>100</output>

<result>100</result>