Read a book mischievously, read 1/3 of the whole book on the first day, read 25% of the whole book on the second day, and left 25 pages unread, how many pages are there in this storybook?
淘气看一本书，第一天看了全书的(1/3)，第二天看了全书的25%，还剩25页未看，这本故事书有多少页．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/3) + (1/4)</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">1 - (7/12)</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">25 / (5/12)</gadget>
<output>60</output>

<result>60</result>