Xiao Ming reads a book. He reads (1/3) of the whole book on the first day, (1/2) of the whole book on the second day, and reads 30 pages on the third day. After finishing the book, this book How many pages are there?
小明读一本书，第一天读了全书的(1/3)，第二天读了全书的(1/2)，第三天读了30页，把这本书读完，这本书一共有多少页？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/3) + (1/2)</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">1 - (5/6)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">30 / (1/6)</gadget>
<output>180</output>

<result>180</result>