7. There is a figure composed of 4 regular hexagons, each with an area of 6. Using the vertices of these 4 hexagons as vertices, the number of equilateral triangles that can be formed with an area of $\mathbf{4}$ is $\qquad$.


Analysis: As shown in the figure, divide the equilateral triangles that meet the conditions into two types, A and B. By substituting them into the original figure, it is easy to find all the cases, which total 8.

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