Students in two classes in the fifth grade collected tree species. The first class had 45 students, each of whom collected 0.13 kilograms, and the second class of 35 students collected a total of 6.15 kilograms. How many kilograms of tree species did each person collect on average in these two classes?
五年级两个班的学生采集树种，一班45人，每人采集0.13千克，二班35人共采集6.15千克，这两个班平均每人采集树种多少千克？
<gadget id="calculator">45 * 0.13</gadget>
<output>5.85</output>

<gadget id="calculator">5.85 + 6.15</gadget>
<output>12</output>

<gadget id="calculator">45 + 35</gadget>
<output>80</output>

<gadget id="calculator">12 / 80</gadget>
<output>3/20 = around 0.15</output>

<result>3/20 = around 0.15</result>