Take a rectangle with a length of 16 cm and a width of 12 cm and cut out the largest square. What is the perimeter of the largest square cut out?
把一张长16厘米，宽12厘米的长方形，剪下一个最大的正方形后，剪下的最大正方形的周长是多少．
<gadget id="calculator">12 * 4</gadget>
<output>48</output>

<result>48</result>