Cut a circle as large as possible from a rectangular piece of paper with a length of 8 cm and a width of 6 cm. What is the radius of this circle in cm?
一张长为8cm、宽为6cm的长方形的纸上剪一个尽量大的圆，这个圆的半径是多少cm
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<result>3</result>