A rectangular piece of paper is 10 cm long and 6 cm wide. Cut out the largest square on this paper. What is the perimeter of this square in cm?
长方形的纸，长10厘米，宽6厘米，在这张纸上剪出一个最大的正方形，这个正方形的周长是多少厘米．
<gadget id="calculator">6 * 4</gadget>
<output>24</output>

<result>24</result>