There are 1,000 books in one batch, among which (1/5) will be distributed to the lower grades, and the rest will be distributed to the middle grades and senior grades at a ratio of 2:3. How many books will the senior grades get?
一批图书共1000本，把其中的(1/5)分给低年级，其余的按2：3分给中年级和高年级，高年级分得多少本书？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1_000 * (4/5)</gadget>
<output>800</output>

<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">800 * (3/5)</gadget>
<output>480</output>

<result>480</result>