A piece of rectangular paper is 85 centimeters long. After cutting off the largest square, a small rectangle is left. What is the perimeter of this small rectangle in centimeters?
一张长方形的纸，长是85厘米，剪去一个最大的正方形后，剩下一个小长方形，这个小长方形的周长是多少厘米．
<gadget id="calculator">85 * 2</gadget>
<output>170</output>

<result>170</result>