The number of pine trees in the forest farm is 4 times that of cypress trees, and the number of cypress trees is 87 fewer than that of pine trees. How many pine trees are there in the forest farm?
林场里松树的棵数是柏树的4倍，柏树的棵数比松树少87棵，林场里有松树多少棵？
<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">87 / 3</gadget>
<output>29</output>

<result>29</result>