In order to support the learning of elementary school students in flood-affected schools, the students of Experimental Primary School carried out book donation activities. The fourth grade donated 125 books, the fifth grade donated 30 more books than the fourth grade, and the sixth grade donated three times as much as the fifth grade. How many books did the sixth grade students of Experimental Primary School donate?
为支援洪涝受灾学校小学生的学习，实验小学学生开展捐书活动．四年级捐125本，五年级比四年级多捐30本，六年级捐的本数是五年级的3倍．实验小学六年级学生捐书多少本？
<gadget id="calculator">125 + 30</gadget>
<output>155</output>

<gadget id="calculator">155 * 3</gadget>
<output>465</output>

<result>465</result>