The third and fourth graders collected a total of 65 kilograms of tree species. The third graders collected 6 bags of 5 kilograms each. How many kilograms did the fourth graders collect?
三、四年级同学一共收集树种65千克，三年级同学收集6袋，每袋5千克，四年级同学收集了多少千克？
<gadget id="calculator">6 * 5</gadget>
<output>30</output>

<gadget id="calculator">65 - 30</gadget>
<output>35</output>

<result>35</result>