small squares with an area of 1 square centimeter are used to form a large square. What is the perimeter of the large square in centimeters?
用4个面积是1平方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厘米
<gadget id="calculator">2 * 4</gadget>
<output>8</output>

<result>8</result>