If a rectangle is enlarged at a ratio of 4:1, how many times will the area of the enlarged rectangle be larger than the original one?
把一个长方形按4：1的比放大，放大后的长方形的面积比原来扩大多少倍．
<gadget id="calculator">4 * 4</gadget>
<output>16</output>

<result>16</result>