Which of the options below is NOT just another way of expressing 348,000 cubits squared?

1). 348 *10^10 microcubits

2). 0.348 Megacubits squared

3). 3.48*10^5 cubits^2

4). 348,000 cubits times cubits

5). 3.48*10^14 nanocubits^2

6). 348,000 cubits^2