The school purchased a batch of 816 new books, which are planned to be distributed to the fourth, fifth and sixth grades according to the ratio of 3:4:5. How many books can the sixth grade get?
学校购进一批新图书共816本，计划按3：4：5的比例分给四、五、六年级．六年级可以分到多少本？
<gadget id="calculator">3 + 4 + 5</gadget>
<output>12</output>

<gadget id="calculator">5 / 12</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">816 * (5/12)</gadget>
<output>340</output>

<result>340</result>