question: Two small circles are inscribed to the biggest circle. The diameter of the biggest circle is 20. Find the area of the shaded region. Round to the nearest tenth.
  Choices:
  A:104.7
  B:157.1
  C:235.6
  D:314.2
query_wo: Please directly answer the question and provide the correct option letter, e.g., A, B, C, D.
  Question: Two small circles are inscribed to the biggest circle. The diameter of the biggest circle is 20. Find the area of the shaded region. Round to the nearest tenth.
  Choices:
  A:104.7
  B:157.1
  C:235.6
  D:314.2
query_cot: Please first conduct reasoning, and then answer the question and provide the correct option letter, e.g., A, B, C, D, at the end.
  Question: Two small circles are inscribed to the biggest circle. The diameter of the biggest circle is 20. Find the area of the shaded region. Round to the nearest tenth.
  Choices:
  A:104.7
  B:157.1
  C:235.6
  D:314.2
question_for_eval: Two small circles are inscribed to the biggest circle. The diameter of the biggest circle is 20. Find the area of the shaded region. Round to the nearest tenth.
  Choices:
  A:104.7
  B:157.1
  C:235.6
  D:314.2