Calculate the area of two shapes, A and B, and their total area. Shape A is a rectangle (12 cm x 7 cm) and Shape B is a square (12 cm side).

Shape A is a rectangle with a length of 12 cm and a width of 7 cm.
The formula for the area of a rectangle is $A = \text{length} \times \text{width}$.

$$A_A = 12\, \text{cm} \times 7\, \text{cm}$$ $$A_A = 84\, \text{cm}^2$$

Shape B is a square with a side length of 12 cm.
The formula for the area of a square is $A = \text{side} \times \text{side}$.

$$A_B = 12\, \text{cm} \times 12\, \text{cm}$$ $$A_B = 144\, \text{cm}^2$$

The total area is the sum of the area of shape A and the area of shape B.

$$A_{\text{total}} = A_A + A_B$$ $$A_{\text{total}} = 84\, \text{cm}^2 + 144\, \text{cm}^2$$ $$A_{\text{total}} = 228\, \text{cm}^2$$

The area of shape A is $\boxed{\text{84 cm}^2}$.
The area of shape B is $\boxed{\text{144 cm}^2}$.
The total area is $\boxed{\text{228 cm}^2}$.