Tairi School launched a book donation activity for Zhihua School on March 6. The fifth grade donated a total of 329 books, which is 5 books less than twice the total number of books donated by the third grade. How many books are donated by the third grade?
泰日学校在3月6日开展了为志华学校捐赠图书活动，五年级一共捐赠图书329本，比三年级捐赠图书总数的2倍少5本，三年级捐赠图示多少本？
<gadget id="calculator">329 + 5</gadget>
<output>334</output>

<gadget id="calculator">334 / 2</gadget>
<output>167</output>

<result>167</result>