4 small squares with a side length of 2 cm are used to form a large square. What is the perimeter of this large square?
用4个边长为2厘米的小正方形拼成一个大正方形，这个大正方形的周长是多少？
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

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

<result>16</result>