Draw the largest circle in a rectangle with a length of 10 cm and a width of 6 cm. What is the radius of this circle in cm?
在一个长10厘米、宽6厘米的长方形里画一个最大的圆，这个圆半径是多少厘米．
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<result>3</result>