Xiaohong reads a story book. She reads (1/4) of the whole book on the first day, and 50 pages on the second day, and leaves (1/3) of the whole book unread. How many pages are there in total?
小红读一本故事书，第一天读了全书的(1/4)，第二天读了50页，还剩下全书的(1/3)没有读，全书共多少页？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/4) - (1/3)</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">50 / (5/12)</gadget>
<output>120</output>

<result>120</result>