Xiao Ming reads a story book. He reads 25% of the whole book on the first day, and the rest (1/3) on the second day. There are still 60 pages left to be read. How many pages are there in this book?
小明看一本故事书，第一天看了全书的25%，第二天看了剩下的(1/3)，还剩下60页没有看完，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>3/4 = around 0.75</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(3/4) * (1/3)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4) - (1/4)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">60 / (1/2)</gadget>
<output>120</output>

<result>120</result>