The school purchased a batch of 216 books and distributed them to the fourth and fifth grades according to the ratio of 3:5. It is known that there are three classes in the fifth grade. Class, class two of five years and class three of five years, how many books are allocated to class one of five years?
学校购进一批图书共216本，按照3：5的比例分给四、五年级，已知五年级共有三个班，分给五年级的书又按照2：3：4分给五年一班、五年二班和五年三班，五年一班分得图书多少本？
<gadget id="calculator">3 + 5</gadget>
<output>8</output>

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

<gadget id="calculator">2 + 3 + 4</gadget>
<output>9</output>

<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">216 * (5/8) * (2/9)</gadget>
<output>30</output>

<result>30</result>