Xiaohong reads an 80-page story book. I read 15 pages on the first day, I read less (1/4) on the first day than on the second day, how many pages did I read on the second day?
小红看一本80页的故事书．第一天看了15页，第一天比第二天少看了(1/4)，第二天看了多少页？
<gadget id="calculator">1 / 4</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">15 / (3/4)</gadget>
<output>20</output>

<result>20</result>