There is a book with 120 pages in total. Li Hua read (1/5) of the whole book on the first day and 25% of the whole book on the second day. How many pages should he read from the third day.
有一本书共120页，李华第一天读了全书的(1/5)，第二天看了全书的25%，第三天应从第多少页读起．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/5) + (1/4)</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">120 * (9/20)</gadget>
<output>54</output>

<gadget id="calculator">54 + 1</gadget>
<output>55</output>

<result>55</result>