Cut a square with a side length of 3 cm from one corner of a rectangular paper with a length of 20 cm and a width of 5 cm. What is the perimeter of the remaining part in cm?
在一张长20厘米，宽5厘米的长方形纸的一角剪去一个边长是3厘米的正方形，剩下部分的周长是多少厘米？
<gadget id="calculator">20 + 5</gadget>
<output>25</output>

<gadget id="calculator">25 * 2</gadget>
<output>50</output>

<result>50</result>