There are 600 apple trees in the orchard, which are 30 fewer than three times the number of pear trees. How many apple trees and pear trees are there altogether?
果园里有苹果树600棵，比梨树棵数的3倍少30棵，苹果树和梨树一共有多少棵？
<gadget id="calculator">600 + 30</gadget>
<output>630</output>

<gadget id="calculator">630 / 3</gadget>
<output>210</output>

<gadget id="calculator">600 + 210</gadget>
<output>810</output>

<result>810</result>