A book, read (1/10) on the first day, read 8 pages more than the first day on the second day, and there are 120 pages left, how many pages does this book have?
一本书，第一天读(1/10)，第二天比第一天多读8页，还剩120页没读，这本书有多少页？
<gadget id="calculator">120 + 8</gadget>
<output>128</output>

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

<gadget id="calculator">1 - (1/10) - (1/10)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">128 / (4/5)</gadget>
<output>160</output>

<result>160</result>