There are 80 poplar trees, which are twice as many as willow trees. How many trees are there in total? what is the correct formula
杨树80棵，是柳树的2倍，两种树共有多少棵？正确算式是多少
<gadget id="calculator">80 / 2</gadget>
<output>40</output>

<gadget id="calculator">40 + 80</gadget>
<output>120</output>

<result>120</result>