12. (5 points) As shown in the figure. After removing a cylinder with a base radius of 2 and a height of 10 from a cube with an edge length of 10, the surface area of the resulting geometric body is $\qquad$ , and the volume is $\qquad$ . ( $\pi$ is taken as 3)
【Answer】Solution: $10 \times 10 \times 6-3 \times 2^{2} \times 2+2 \times 3 \times 2 \times 10$,
$$
\begin{array}{l}
=600-24+120 \\
=696 \\
10 \times 10 \times 10-3 \times 2^{2} \times 10, \\
=1000-120 \\
=880
\end{array}
$$

Answer: The surface area of the obtained geometric body is 696, and the volume is 880.
The answer is: 696, 880.
The opposite side of “希” is “望”.
Answer: The opposite side of “希” is “望”, the opposite side of “望” is “希”, and the opposite side of “杯” is “学”.