A book of fairy tales has 120 pages, and Xiaohong plans to read it in three days. I read the whole book (1/4) on the first day and the rest (2/3) on the second day. How many pages should Xiaohong read to finish on the third day?
一本童话书共120页，小红计划三天看完．第一天看了全书的(1/4)，第二天看了剩下的(2/3)．小红第三天应该看多少页才能看完？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

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

<gadget id="calculator">(3/4) * (2/3)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (1/4) - (1/2)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">120 * (1/4)</gadget>
<output>30</output>

<result>30</result>