A rectangular piece of paper is 80cm long and 60cm wide. Use this paper to cut out the largest circle. What is the area of the circle?
一张长方形纸片，长80cm，宽60cm，用这张纸剪下一个最大的圆，圆的面积是多少？
<gadget id="calculator">3.14 * 30 * 30</gadget>
<output>2_826</output>

<result>2_826</result>