Cut a circle with a diameter of 6 decimeters into several equal parts along the radius, and then assemble it into an approximate rectangle. What is the circumference of this rectangle in decimeters?
把一个直径6分米的圆，沿半径平均剪成若干等份，再拼成一个近似的长方形，这个长方形的周长约是多少分米．
<gadget id="calculator">3.14 * 6</gadget>
<output>18.84</output>

<gadget id="calculator">18.84 + 6</gadget>
<output>24.84</output>

<result>24.84</result>