Xiao Ming borrowed a famous book from the library, read the whole book (1/8) on the first day, read 20 pages more than the first day on the second day, and left 250 pages unread. How many pages does this book have?
小明从图书馆借来一本名著，第一天看了全书的(1/8)，第二天比第一天多看了20页，还剩250页没看．这本书一共有多少页？
<gadget id="calculator">250 + 20</gadget>
<output>270</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(1/8) * 2</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">270 / (3/4)</gadget>
<output>360</output>

<result>360</result>