There are 255 apple trees in the orchard, and 35 pear trees will be exactly equal to the apple trees. If every 20 pear trees are planted in a row, how many rows of pear trees can be planted in total?
果园里有255棵苹果树，再种35棵梨树就正好和苹果树相等．如果梨树每20棵种一排，梨树一共可以种多少排？
<gadget id="calculator">255 - 35</gadget>
<output>220</output>

<gadget id="calculator">220 / 20</gadget>
<output>11</output>

<result>11</result>