The diameter of the small circle is (3/4) of the diameter of the large circle, and the area of the small circle is the area of the large circle
小圆直径是大圆直径的(3/4)，小圆面积是大圆面积的多少
<gadget id="calculator">9 / 16</gadget>
<output>9/16 = around 0.5625</output>

<result>9/16 = around 0.5625</result>