It is known that the radius of the large circle is (5/4) the radius of the small circle. How much is the area of the large circle larger than the area of the small circle? (fill in a fraction)
已知大圆的半径长是小圆的半径长的(5/4)，这个大圆的面积比小圆的面积大多少．(填几分之几)
<gadget id="calculator">9 / 16</gadget>
<output>9/16 = around 0.5625</output>

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