There are 36 apple trees, 9 are planted first, and now the rest should be planted in 3 rows. How many apple trees are there in each row? How much is the column.
有36棵苹果树，先栽了9棵，现在要把剩下的栽成3行，每行载多少棵？列式为多少．
<gadget id="calculator">36 - 9</gadget>
<output>27</output>

<gadget id="calculator">27 / 3</gadget>
<output>9</output>

<result>9</result>