Round 4.5678×1034.5678 \times 10^34.5678×103 to 333 significant figures.
4.57×1034.57 \times 10^34.57×103
4.56×1034.56 \times 10^34.56×103
4.6×1034.6 \times 10^34.6×103
4.568×1034.568 \times 10^34.568×103