In the orchard of Uncle Zhang’s family, there are 126 peach trees, twice as many as apple trees, and three times as many pear trees as apple trees. How many pear trees are there in Uncle Zhang's orchard?
张大爷家的果园里有桃树126棵，是苹果树的2倍，梨树的棵数是苹果树的3倍．张大爷家果园里的梨树有多少棵．
<gadget id="calculator">126 / 2</gadget>
<output>63</output>

<gadget id="calculator">63 * 3</gadget>
<output>189</output>

<result>189</result>