What is the perimeter of four small squares with a side length of 3 cm to form a large square?
把四个边长为3厘米的小正方形拼成一个大正方形，周长是多少
<gadget id="calculator">2 * 3</gadget>
<output>6</output>

<gadget id="calculator">6 * 4</gadget>
<output>24</output>

<result>24</result>