A book, Xiaohong has read (3/8), how much less than the number of pages that have not been read
一本书，小红看了(3/8)，比未看的页数少多少
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">1 - (3/8) - (3/8)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (3/8)</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">(1/4) / (5/8)</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>