A rectangle with a perimeter of 8 cm is composed of 3 identical small squares, what is the perimeter of each small square?
周长为8厘米的长方形，由3个一样的小正方形拼成，那么每个小正方形周长是多少？
<gadget id="calculator">8 / 8</gadget>
<output>1</output>

<gadget id="calculator">1 * 4</gadget>
<output>4</output>

<result>4</result>