square with a side length of 10 centimeters draws a largest circle inside it, what is the radius of the circle in centimeters?
一个正方形边长是10厘米，在它里面画一个最大的圆，圆的半径是多少厘米．
<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<result>5</result>