When 3 squares with an area of 1cm**2 are put together to form a rectangle, what is its perimeter in cm
把3个面积是1cm**2的正方形拼成一个长方形后，它的周长是多少cm
<gadget id="calculator">3 * 1</gadget>
<output>3</output>

<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<result>8</result>