If two rectangles with a length of 3 cm and a width of 2 cm are put together to form a large rectangle, what is the area of the rectangle in square centimetres?
两个长3厘米，宽2厘米的长方形拼成一个大的长方形，长方形的面积是多少平方厘米．
<gadget id="calculator">3 + 3</gadget>
<output>6</output>

<gadget id="calculator">6 * 2</gadget>
<output>12</output>

<result>12</result>