There are 36 peach trees in the orchard, the number of peach trees is equal to that of apricot trees (4/9), and the number of apple trees is equal to that of apricot trees (2/3), how many apple trees are there?
果园里有桃树36棵，桃树棵数是杏树的(4/9)，苹果树棵数是杏树的(2/3)，苹果树有多少棵？
<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">36 / (4/9)</gadget>
<output>81</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">81 * (2/3)</gadget>
<output>54</output>

<result>54</result>