Yucai Experimental Primary School plans to donate a batch of books to the "Hand in Hand" school. The first delivery of 480 books is the second delivery (4/5), and the number of books sent is 25% of the total books. How many books are there in total?
育才实验小学计划给"手拉手"学校赠送一批图书．第一次送出480本，是第二次送出的(4/5)，送的图书数是总图书的25%．这批图书共有多少本？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">480 / (4/5)</gadget>
<output>600</output>

<gadget id="calculator">600 + 480</gadget>
<output>1_080</output>

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

<gadget id="calculator">1_080 / (1/4)</gadget>
<output>4_320</output>

<result>4_320</result>