Xiao Ming reads a book in 9 days, and on average (1/10) reads 2 more pages of this book every day. How many pages does this book have?
小明用9天看完一本书，平均每天看了这本书的(1/10)还多2页，这本书共有多少页？
<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/9) - (1/10)</gadget>
<output>1/90 = around 0.011111</output>

<gadget id="calculator">2 / (1/90)</gadget>
<output>180</output>

<result>180</result>