There are three kinds of fruit trees in the orchard. The number of pear trees is 2/3 of that of apple trees, and the number of peach trees is 2/5 of that of pear trees. There are 60 peach trees. How many apple trees are there?
果园里有三种果树，梨树的棵数是苹果树的(2/3)，桃树的棵数是梨树的(2/5)，已知桃树60棵，苹果树有多少棵？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

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

<gadget id="calculator">60 / (2/5) / (2/3)</gadget>
<output>225</output>

<result>225</result>