Cut out the largest square from a rectangle with a length of 4 cm and a width of 3 cm. What is the perimeter of the square in cm?
从长是4厘米，宽是3厘米的长方形中截出一个最大的正方形，正方形的周长是多少厘米．
<gadget id="calculator">3 * 4</gadget>
<output>12</output>

<result>12</result>