Xiaoli plans to read a book in three days. She reads (2/7) of the whole book on the first day and (3/5) of the whole book on the second day. It is known that this book has 105 pages. How many pages did you read in three days?
小丽计划三天看完一本书，第一天看了全书的(2/7)，第二天看了全书的(3/5)，已知这本书有105页，那么小丽第三天看了多少页？
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (2/7) - (3/5)</gadget>
<output>4/35 = around 0.114286</output>

<gadget id="calculator">105 * (4/35)</gadget>
<output>12</output>

<result>12</result>