The Arbor Day of Guanghua Elementary School organized students to plant trees. The third grade planted 350 trees, the fifth grade planted 122 more trees than the third grade, and the fourth grade planted 167 fewer trees than the fifth grade. How many trees are planted in fourth grade?
光华小学植树节组织同学们去植树，三年级植树350棵，五年级比三年级多植树122棵，四年级比五年级少植树167棵．四年级植树多少棵？
<gadget id="calculator">122 - 167</gadget>
<output>-45</output>

<gadget id="calculator">350 + (-45)</gadget>
<output>305</output>

<result>305</result>