If the radius of a circle is increased by 5 times its original size, then its area will be increased by how many times its original size.
一个圆的半径扩大为原来的5倍，则它的面积扩大为原来的多少倍．
<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<result>25</result>