question: A rectangle is inscribed between the $x$-axis and the parabola, as shown in the figure below. Write the area $A$ of the rectangle as a function of $x$.
query_wo: Please directly answer the question and provide the final value, e.g., 1, 2.5, 300.
  Question: A rectangle is inscribed between the $x$-axis and the parabola, as shown in the figure below. Write the area $A$ of the rectangle as a function of $x$.
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 rectangle is inscribed between the $x$-axis and the parabola, as shown in the figure below. Write the area $A$ of the rectangle as a function of $x$.
question_for_eval: A rectangle is inscribed between the $x$-axis and the parabola, as shown in the figure below. Write the area $A$ of the rectangle as a function of $x$.