A rectangular piece of paper is 60 cm long and 40 cm wide. Use this paper to cut out the largest circle. What is the circumference of this circle?
一张长方形纸片，长60厘米，宽40厘米，用这张纸剪下一个最大的圆，这个圆的周长是多少？
<gadget id="calculator">3.14 * 40</gadget>
<output>125.6</output>

<result>125.6</result>