Draw the largest circle in a rectangle with a length of 6 cm and a width of 4 cm. What is the radius of the circle in centimeters?
在一个长6cm宽4cm的长方形内画一个最大的圆，圆的半径应该是多少厘米．
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<result>2</result>