Consider the halfpipe with a diameter of 8 cm.

Find its volume, rounding to two decimal places.
Please directly answer the question and provide the final value, e.g., 1, 2.5, 300.
Question: Consider the halfpipe with a diameter of 8 cm.

Find its volume, rounding to two decimal places.
Please first conduct reasoning, and then answer the question and provide the final value, e.g., 1, 2.5, 300, at the end.
Question: Consider the halfpipe with a diameter of 8 cm.

Find its volume, rounding to two decimal places.