On Arbor Day, plant 120 cypress trees, 36 fewer pine trees than cypress trees, and three times as many poplar trees as cypress and pine trees. How many poplar trees are planted?
植树节，栽柏树120棵，松树比柏树少36棵，杨树的棵树是柏树和松树的3倍，栽杨树多少棵？
<gadget id="calculator">120 - 36</gadget>
<output>84</output>

<gadget id="calculator">84 + 120</gadget>
<output>204</output>

<gadget id="calculator">204 * 3</gadget>
<output>612</output>

<result>612</result>