There are 300 peach trees, and there are 30 more peach trees than twice as many apricot trees. How many apricot trees are there?
桃树有300棵，桃树比杏树的2倍多30棵，杏树有多少棵？
<gadget id="calculator">300 - 30</gadget>
<output>270</output>

<gadget id="calculator">270 / 2</gadget>
<output>135</output>

<result>135</result>