Cut out the largest square from one end of a rectangular piece of paper 25 cm long, what is the circumference of the remaining piece of paper in centimeters?
从一张长25厘米的长方形纸片的一端剪下一个最大的正方形，剩下的纸片的周长是多少厘米．
<gadget id="calculator">25 * 2</gadget>
<output>50</output>

<result>50</result>