If the radius of a circle is increased to 5 times its original size, how many times its area will be increased to its original size?
一个圆的半径扩大到原来的5倍，那么它的面积扩大到原来的多少倍
<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<result>25</result>