Xiaoxing reads an extra-curricular book. He reads (1/6) of the whole book on the first day and (1/5) of the whole book on the second day. In two days, he read 33 pages in total. How many pages does this book have.
小星看一本课外书，第一天看了全书的(1/6)，第二天看了全书的(1/5)，两天一共看了33页．这本书有多少页．
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/6) + (1/5)</gadget>
<output>11/30 = around 0.366667</output>

<gadget id="calculator">33 / (11/30)</gadget>
<output>90</output>

<result>90</result>