Cut out the largest circle from a piece of rectangular paper with a length of 8 cm and a width of 6 cm. What is its radius in cm?
用一张长8厘米宽6厘米的长方形纸剪一个最大的圆，它的半径是多少厘米．
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<result>3</result>