Cut out the largest square from a rectangular paper with a length of 10 cm and a width of 8 cm. What is the perimeter of the remaining rectangular paper in cm?
从一个长10厘米、宽8厘米的长方形纸上剪下一个最大的正方形，则剩下的长方形纸的周长是多少厘米．
<gadget id="calculator">10 - 8</gadget>
<output>2</output>

<gadget id="calculator">8 + 2</gadget>
<output>10</output>

<gadget id="calculator">10 * 2</gadget>
<output>20</output>

<result>20</result>