There are 72 peach trees in the orchard, 8 fewer than twice as many apple trees. How many apple trees are there? (Solution of column equation)
果园有桃树72棵，比苹果树的2倍少8棵，苹果树有多少棵？(列方程解)
<gadget id="calculator">72 + 8</gadget>
<output>80</output>

<gadget id="calculator">80 / 2</gadget>
<output>40</output>

<result>40</result>