7×103 N7 \times 10^{3} \mathrm{~N}7×103 N
7N7N7N
7×105 N7 \times 10^{5} \mathrm{~N}7×105 N
7×106 N7 \times 10^{6} \mathrm{~N}7×106 N
8 N8 \ N8 N