4 small squares with side length 1 cm are put together to form a large rectangle, what is the perimeter of this rectangle in cm
把4个边长1厘米小正方形拼成一个大长方形，这个长方形的周长是多少厘米
<gadget id="calculator">4 * 1</gadget>
<output>4</output>

<gadget id="calculator">4 + 1</gadget>
<output>5</output>

<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<result>10</result>