If a square with a side length of 2 cm is enlarged by 3:1, what is the area in square centimeters?
把一个边长2厘米的正方形按3：1扩大后，面积是多少平方厘米．
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">6 * 6</gadget>
<output>36</output>

<result>36</result>