Big cube

Calculate the surface of the cube, which is composed of 64 small cubes with an edge 1 cm long.

Correct answer:

S =  96 cm²

Step-by-step explanation:

$$\begin{gathered} a_1=1\text{ cm } \\ {a}_2=\sqrt[3]{64}\cdot a_1=\sqrt[3]{64}\cdot 1=4\text{ cm } \\ S=6\cdot a_2^2=6\cdot 4^2=96{\text{cm}}^2 \end{gathered}$$

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