An orchard covers an area of 20 hectares, of which (2/5) are planted with apple trees, and the area planted with pear trees is (1/4) of that of apple 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，种梨树的面积是苹果树的(1/4)，梨树种了多少公顷？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">20 * (2/5) * (1/4)</gadget>
<output>2</output>

<result>2</result>