Last year there were 400 pear trees and peach trees in the orchard, of which peach trees accounted for 40% of the total. This year, we planted some peach trees again, but the number of pear trees remains the same. This means that pear trees account for 48% of the total. How many of these two kinds of fruit trees are there now?
去年果园里有梨树和桃树共400棵，其中桃树占总数的40%．今年又种一些桃树，梨树棵树不变，这是梨树占总数的48%，现在这两种果树一共有多少棵．
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">48 / 100</gadget>
<output>12/25 = around 0.48</output>

<gadget id="calculator">(3/5) / (12/25)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">400 * (5/4)</gadget>
<output>500</output>

<result>500</result>