3×10−3 cm3\times 10^{-3}\mathrm{~cm}3×10−3 cm
3×104 cm3\times 10^4\mathrm{~cm}3×104 cm
3×10−5 cm3\times 10^{-5}\mathrm{~cm}3×10−5 cm
6×10−6 cm6\times 10^{-6}\mathrm{~cm}6×10−6 cm
