If a rectangle with a length of 2 cm and a width of 1 cm is enlarged by 2:1, what is the area of the obtained figure in cm**2.
若一个长2cm、宽1cm的长方形按2：1扩大，得到的图形的面积是多少cm**2．
<gadget id="calculator">2 * 2 * 2 * 1</gadget>
<output>8</output>

<result>8</result>