"There are five pairs of eyeglasses on the table."
Translation:Aia ʻelima makaaniani ma ke pākaukau.
Both "ke" and "ka" are actually used with pākaukau. On Kauaʻi, we ordinarily hear only "ka," but in traditional Hawaiian writings, both are used although "ke" seems to be somewhat more common than "ka" (170 times vs. 38 times in Hawaiian newspapers).
BTW, also in the Hawaiian newspapers you'll almost always find "ma luna o ka/ke pākaukau" instead of just "ma ka/ke pākaukau." Too bad locatives aren't used more in DL.