Answer is.. 144.
2 x 4 = 8
9 x 8 = 72
72 x 2 = 144

Notice that

which means the series is divergent. So if this is one of those "select all that apply" questions, then both (c) and (j) are the only choices that do.
3/8 times 8/3 = 1
Answer=8/3
Six hundred times 300 equals 180,000