In the school's "Strive to be an Environmental Protection Guard" activity, the sixth grade students collected 360 kilograms more waste newspapers than the third grade students, and the ratio of the quality of newspapers collected by the sixth grade to the quality of the newspapers collected by the third grade was 3:1. How many kilograms of waste newspapers did the sixth graders collect?
在学校开展的"争做环保卫士"活动中，六年级同学比三年级同学多收集了废旧报纸360千克，六年级收集的报纸质量与三年级收集的报纸质量之比是3：1．六年级同学收集了多少千克废旧报纸？
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">360 / 2</gadget>
<output>180</output>

<gadget id="calculator">180 * 3</gadget>
<output>540</output>

<result>540</result>