The orchard in Wuxing Township covers an area of 20 hectares, of which (1/5) is planted with apple trees, and (1/4) is planted with pear trees. How many hectares are there fewer apple trees than pear trees?
五星乡果园占地20公顷，其中的(1/5)种苹果树，(1/4)种梨树，苹果树比梨树少多少公顷？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/4) - (1/5)</gadget>
<output>1/20 = around 0.05</output>

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

<result>1</result>