If you cut a circle with a radius of 5 cm into an approximate rectangle, how many centimeters does the perimeter of the rectangle increase from the perimeter of the circle?
把一个半径为5厘米的圆剪拼成近似的长方形，长方形的周长比圆的周长增加了多少厘米．
<gadget id="calculator">3.14 * 2 * 5</gadget>
<output>31.4</output>

<gadget id="calculator">31.4 / 2</gadget>
<output>15.7</output>

<gadget id="calculator">15.7 + 5</gadget>
<output>20.7</output>

<gadget id="calculator">20.7 * 2</gadget>
<output>41.4</output>

<gadget id="calculator">41.4 - 31.4</gadget>
<output>10</output>

<result>10</result>