To protect the environment, start with me. The students recycle waste batteries. The first group of 9 people recycled 164 batteries in total. The second group of 8 people recycled 150 batteries. The third group of 8 people recycled 17 batteries on average. How many waste batteries do the students in each group recycle on average?
保护环境，从我做起，同学们回收废旧电池，第一组9人，共回收164节，第二组8人，工回收150节，第三组8人，平均每人回收17节，三个组的同学平均每人回收多少节废电池？
<gadget id="calculator">17 * 8</gadget>
<output>136</output>

<gadget id="calculator">164 + 150 + 136</gadget>
<output>450</output>

<gadget id="calculator">9 + 8 + 8</gadget>
<output>25</output>

<gadget id="calculator">450 / 25</gadget>
<output>18</output>

<result>18</result>