Draw the largest circle in a square whose side length is 3 cm. What is the radius of the circle in cm?
在边长是3厘米的正方形内画一个最大的圆，圆的半径是多少厘米．
<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<result>3/2 = around 1.5</result>