There are three kinds of trees in the park. There are 20 peach trees, accounting for 20% of the total. The ratio of apple trees to pear trees is 3:2. How many pear trees are there?
公园里有三种树，桃树20棵，占总数的20%，苹果树和梨树的棵数比是3：2，梨树多少棵？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">20 / (1/5)</gadget>
<output>100</output>

<gadget id="calculator">100 - 20</gadget>
<output>80</output>

<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">80 * (2/5)</gadget>
<output>32</output>

<result>32</result>