After reading a book in 9 days, and reading this book (1/10) more than 2 pages every day, how many pages are there in total?
看一本书9天看完，每天看这本书(1/10)多2页，这本书共多少页？
<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>