Cut the largest square out of a rectangle 8 cm long and 4 cm wide. What is the perimeter of the remaining figure?
从长8厘米，宽4厘米的长方形中剪下一个最大的正方形，剩下图形的周长是多少？
<gadget id="calculator">8 - 4</gadget>
<output>4</output>

<gadget id="calculator">4 * 4</gadget>
<output>16</output>

<result>16</result>