An orchard covers an area of 20 hectares, of which (2/5) are planted with apple trees, and the area planted with apple trees is (2/3) that of pear trees, how many hectares are planted with pear trees?
一个果园占地20公顷，其中的(2/5)种苹果树，种苹果树的面积是梨树的(2/3)，梨树种了多少公顷？
<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">(2/5) / (2/3)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">20 * (3/5)</gadget>
<output>12</output>

<result>12</result>