Xiao Ming reads 480 pages of a book. He reads (1/4) on the first day and the rest (4/5) on the second day. How many pages are left unread?
小明读一本书480页，第一天读了(1/4)，第二天读了余下的(4/5)，还有多少页没有读？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">480 * (1/4)</gadget>
<output>120</output>

<gadget id="calculator">480 - 120</gadget>
<output>360</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">360 * (4/5)</gadget>
<output>288</output>

<gadget id="calculator">360 - 288</gadget>
<output>72</output>

<result>72</result>