Xiao Ming reads a book. The number of pages he has read is 13 pages more than (1/4) of the whole book, and the number of pages he has not read is 3 pages less than (2/3) of the whole book. How many pages are there in total?
小明看一本书，看过的页数比全书的(1/4)多13页，没看的页数比全书的(2/3)少3页，全书共多少页？
<gadget id="calculator">13 - 3</gadget>
<output>10</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 - (1/4) - (2/3)</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">10 / (1/12)</gadget>
<output>120</output>

<result>120</result>