The students want to plant 163 trees, 18 of which have already been planted, and the remaining saplings are distributed to 5 groups on average. How many trees do each group need to plant?
同学们要种163棵树，已经种了18棵，剩下的树苗平均分给5个小组，每个小组还要种多少棵？
<gadget id="calculator">163 - 18</gadget>
<output>145</output>

<gadget id="calculator">145 / 5</gadget>
<output>29</output>

<result>29</result>