6.67×10−11 N6.67 \times 10^{-11} \mathrm{~N}6.67×10−11 N
6.67×10−9 N6.67 \times 10^{-9} \mathrm{~N}6.67×10−9 N
6.67×1011 N6.67 \times 10^{11} \mathrm{~N}6.67×1011 N
6.7×109 N6.7 \times 10^{9} \mathrm{~N}6.7×109 N
