There are 40 cypress trees in the park, twice the number of pine trees. How many pine trees and cypress trees are there in the park?
公园里有柏树40棵，是松树棵数的2倍，公园里松树和柏树一共有多少棵？
<gadget id="calculator">40 / 2</gadget>
<output>20</output>

<gadget id="calculator">20 + 40</gadget>
<output>60</output>

<result>60</result>