2×10−4 cm2 \times 10^{-4} \mathrm{~cm}2×10−4 cm
4×10−4 m4 \times 10^{-4} \mathrm{~m}4×10−4 m
2×10−4 km2 \times 10^{-4} \mathrm{~km}2×10−4 km
2×10−4 m2 \times 10^{-4} \mathrm{~m}2×10−4 m
2×10−3 m2 \times 10^{-3} \mathrm{~m}2×10−3 m
