6×1010erg6 \times 10^{10} \mathrm{erg}6×1010erg
6×108erg6 \times 10^{8} \mathrm{erg}6×108erg
6×105erg6 \times 10^{5} \mathrm{erg}6×105erg
6×107erg6 \times 10^{7} \mathrm{erg}6×107erg