There are 200 peach trees in the orchard, and there are 20% fewer pear trees than peach trees. How many more peach trees are there than pear trees?
果园有桃树200棵，梨树比桃树少20%，桃树比梨树多多少棵？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">200 * (4/5)</gadget>
<output>160</output>

<gadget id="calculator">200 - 160</gadget>
<output>40</output>

<result>40</result>