[ 20 cm + 8 cm + 21,5 cm ] \cdot 12 cm
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594\left(cm\right)^{2}
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594\left(cm\right)^{2}
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\left(28cm+21,5cm\right)\times 12cm
Combine 20cm and 8cm to get 28cm.
49,5cm\times 12cm
Combine 28cm and 21,5cm to get 49,5cm.
594cmcm
Multiply 49,5 and 12 to get 594.
594c^{2}mm
Multiply c and c to get c^{2}.
594c^{2}m^{2}
Multiply m and m to get m^{2}.
\left(28cm+21,5cm\right)\times 12cm
Combine 20cm and 8cm to get 28cm.
49,5cm\times 12cm
Combine 28cm and 21,5cm to get 49,5cm.
594cmcm
Multiply 49,5 and 12 to get 594.
594c^{2}mm
Multiply c and c to get c^{2}.
594c^{2}m^{2}
Multiply m and m to get m^{2}.
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