There are 564 jujube trees in the orchard, 280 more than apple trees. How many apple trees are there? (solved with equations)
果园里有枣树564棵，比苹果树多280棵，苹果树有多少棵？(用方程解决)
<gadget id="calculator">564 - 280</gadget>
<output>284</output>

<result>284</result>