The area of a square is 16 square decimeters, if it is enlarged at a ratio of 3:1, what is the area of the enlarged figure?
一个正方形的面积是16平方分米，把它按3：1的比放大，放大后图形的面积是多少平方分米
<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<gadget id="calculator">12 * 12</gadget>
<output>144</output>

<result>144</result>