A 300-page "World Geography", Xiaohong has read (5/6), how many pages have not been read?
一本300页的《世界地理》，小红看了(5/6)，还有多少页没有看？
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">1 - (5/6)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">300 * (1/6)</gadget>
<output>50</output>

<result>50</result>