If the diameter of the large circle is 3 times the diameter of the small circle, then how many times the area of the large circle is the area of the small circle.
如果大圆直径是小圆直径的3倍，那么大圆面积是小圆面积的多少倍．
<gadget id="calculator">9 / 1</gadget>
<output>9</output>

<result>9</result>