Xiaoxiao reads a storybook. He read 40% of the whole book on the first day, and 1/4 of the whole book on the second day. He read a total of 52 pages in two days. How many pages does this storybook have?
笑笑读一本故事书，第一天读了全书的40%，第二天读了全书的(1/4)，两天共读了52页，这本故事书共有多少页？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(2/5) + (1/4)</gadget>
<output>13/20 = around 0.65</output>

<gadget id="calculator">52 / (13/20)</gadget>
<output>80</output>

<result>80</result>