question: A right trapezoid, with one of its base angles measuring 30^\circ, has an adjacent leg length of 8 to this angle. The length of the shorter base of the trapezoid is 4. Find t.
query_wo: Please directly answer the question and provide the final value, e.g., 1, 2.5, 300.
  Question: A right trapezoid, with one of its base angles measuring 30^\circ, has an adjacent leg length of 8 to this angle. The length of the shorter base of the trapezoid is 4. Find t.
query_cot: Please first conduct reasoning, and then answer the question and provide the final value, e.g., 1, 2.5, 300, at the end.
  Question: A right trapezoid, with one of its base angles measuring 30^\circ, has an adjacent leg length of 8 to this angle. The length of the shorter base of the trapezoid is 4. Find t.
question_for_eval: A right trapezoid, with one of its base angles measuring 30^\circ, has an adjacent leg length of 8 to this angle. The length of the shorter base of the trapezoid is 4. Find t.