What is the perimeter in centimeters of the rectangle formed by combining 2 squares with side lengths of 1 cm?
用2个边长1厘米的正方形拼成的长方形的周长是多少厘米厘米．
<gadget id="calculator">1 + 1 + 1</gadget>
<output>3</output>

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

<result>6</result>