In order to enhance the image of the city, a certain city deliberately enlarged the length of a rectangular street garden to 4 times its original size and its width to 3 times its original size. How many times has its area been enlarged?
某市为提升城市形象，特意把一个长方形街心花园的长扩大到原来的4倍，宽扩大到原来的3倍，它的面积扩大了多少倍．
<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<result>12</result>