A book has 400 pages. Xiao Liu reads this book every day (1/10), while Xiao Li reads it every day (4/5). How many pages does Xiao Li read every day?
一本书400页，小刘每天看这本书的(1/10)，是小李每天看的(4/5)．小李每天看了多少页？
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(1/10) / (4/5)</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">400 * (1/8)</gadget>
<output>50</output>

<result>50</result>