An orchard covers an area of 20,000 square meters, among which (2/5) are apple trees and (1/4) are pear trees. How many square meters are there more apple trees than pear trees?
一个果园占地20000平方米，其中的(2/5)种苹果树，(1/4)种梨树，苹果树比梨树多多少平方米？
<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">(2/5) - (1/4)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">20_000 * (3/20)</gadget>
<output>3_000</output>

<result>3_000</result>