If a rectangle with a length of 6 cm and a width of 4 cm is enlarged by 3:1, what is the area of the figure obtained in square centimeters?
一个长6厘米、宽4厘米的长方形按3：1放大，得到的图形的面积是多少平方厘米．
<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<gadget id="calculator">18 * 12</gadget>
<output>216</output>

<result>216</result>