Chen Zhen read a storybook. On the first day, he read 180 pages, 25% more than on the second day. On the second day, he read the whole book (1/6). How many pages does this book have?
陈震同学读一个故事书，第一天读了180页，比第二天读的多25%，第二天读的是全书的(1/6)，这本书共有多少页？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">180 / (5/4) / (1/6)</gadget>
<output>864</output>

<result>864</result>