If two squares with a perimeter of 4cm are put together to form a rectangle, what is the perimeter of the rectangle?
两个周长是4cm的正方形，拼成一个长方形，这个长方形的周长是多少
<gadget id="calculator">1 * 2</gadget>
<output>2</output>

<gadget id="calculator">2 + 1</gadget>
<output>3</output>

<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<result>6</result>