If a circle with a radius of 3 cm is cut inside a square, what is the smallest perimeter of the square in cm?
在一个正方形内剪一个半径为3厘米的圆，则正方形的最小周长是多少厘米
<gadget id="calculator">3 * 2 * 4</gadget>
<output>24</output>

<result>24</result>