[tex]45000 \: {cm}^{2} = 4.5 \: {m}^{2} [/tex]
[tex]12 \: {hm}^{2} = 120000 \: {m}^{2} [/tex]
[tex]5463 \: {mm}^{2} = 0.005463 \: {m}^{2} [/tex]
[tex]123 \: {dam}^{2} = 0.0123 \: {km}^{2} [/tex]
[tex]23000 \: {m}^{2} = 0.023 \: {km}^{2} [/tex]
[tex]13.75 \: {hm}^{2} = 0.1375 \: {km}^{2} [/tex]
