
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
In a regular quadrilateral frustum with lateral edges \(A A_{1}, B B_{1}, C C_{1}, D D_{1}\), the side length of the upper base \(A_{1} B_{1} C_{1} D_{1}\) is 1, and the side length of the lower base is 7. A plane passing through the edge \(B_{1} C_{1}\) perpendicular to the plane \(A D_{1} C\) divides the frustum into two equal-volume parts. Find the volume of the frustum.

Present the answer in LaTex format: \boxed{Your answer}
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