The school purchased 480 books, and distributed (1/3) among them to the lower grades, and distributed the rest to the upper grades and middle grades at a ratio of 5:3.
学校购进480本图书，把其中的(1/3)分给低年级，余下的按5﹕3分别分给高年级和中年级，高年级比中年级多分多少本书？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">5 + 3</gadget>
<output>8</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">480 * (2/3) * (5/8)</gadget>
<output>200</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">480 * (2/3) * (3/8)</gadget>
<output>120</output>

<gadget id="calculator">200 - 120</gadget>
<output>80</output>

<result>80</result>