There are 14 poplar trees in the school. The number of poplar trees is twice that of pine trees, and there are 4 more willow trees than pine trees. How many willow trees are there?
学校有14棵杨树，杨树的棵数是松树的2倍，柳树比松树多4棵，有多少棵柳树？
<gadget id="calculator">14 / 2</gadget>
<output>7</output>

<gadget id="calculator">7 + 4</gadget>
<output>11</output>

<result>11</result>