Xiaohua reads a book, and after reading it for 7 days, half of the book remains. After that, I read 12 pages every day, and just finished reading in 5 days. How many pages do you read on average per day?
小华读一本书，读了7天还剩这本书的一半．以后每天读12页，5天正好读完．平均每天读多少页？
<gadget id="calculator">7 + 5</gadget>
<output>12</output>

<gadget id="calculator">2 / 12</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">12 * 5 * (1/6)</gadget>
<output>10</output>

<result>10</result>