Dongdong planned to finish reading a book of "Fairy Tales" in three days. He read exactly 15% of the book on the first day, and then read 60 pages on the second day. It is exactly 1:3. According to the plan, how many pages will Dongdong continue to read on the third day?
东东计划三天看完一本《童话故事》书，第一天正好看了全书的15%，第二天接着看了60页，这时东东发现剩下的与已看的页数比正好是1：3．按计划东东第三天继续要看多少页？
<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">(3/4) - (3/20)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">60 / (3/5)</gadget>
<output>100</output>

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

<gadget id="calculator">100 * (1/4)</gadget>
<output>25</output>

<result>25</result>