Li Village planted 320 poplars this year, which is 150 fewer than pine trees. How many pine trees are there? (solution by equation)
李村今年栽杨树320棵，比松树少150棵，松树多少棵？(用方程解)
<gadget id="calculator">150 + 320</gadget>
<output>470</output>

<result>470</result>