There are 360 pear trees in the orchard, 30 fewer than apple trees. If these apple trees are arranged in 30 rows, how many are there in each row?
果园里有360棵梨树，比苹果树少30棵．把这些苹果树排成30行，那么每行有几棵？
<gadget id="calculator">360 + 30</gadget>
<output>390</output>

<gadget id="calculator">390 / 30</gadget>
<output>13</output>

<result>13</result>