There are 30 peach trees in the orchard, and the number of pear trees is less than that of peach trees (3/5). How many pear trees are there?
果园里有30桃树，梨树棵数比桃树少(3/5)，梨树有多少棵？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">30 * (2/5)</gadget>
<output>12</output>

<result>12</result>