6. (10 points) The solid figure shown is composed of 9 cubes with edge lengths of 1. The surface area of this solid figure is . $\qquad$
6. (10 points) The solid figure shown is composed of 9 cubes with edge lengths of 1, and the surface area of this solid figure is 
32.
【Analysis】The surface area of this solid figure = the top surface area + the bottom surface area + the front surface area + the back surface area + the two side surface areas.
【Solution】Solution: The area seen from the top and bottom is $2 \times 5 \times(1 \times 1)=10$,
The area seen from the front and back is $2 \times 5 \times(1 \times 1)=10$,
The area seen from the two sides is $2 \times 6 \times(1 \times 1)=12$,
Therefore, the surface area of this solid figure is $10+10+12=32$.
The answer is: 32.