The perimeter ratio of circles A and B is 4:3, and the area of circle A is 36cm**2, then the possible area of circle B is cm**2.
A、B两圆的周长比是4：3，其中A圆的面积是36cm**2则B圆的面积可能多少cm**2．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(3/4) ** 2</gadget>
<output>9/16 = around 0.5625</output>

<gadget id="calculator">36 * (9/16)</gadget>
<output>81/4 = around 20.25</output>

<result>81/4 = around 20.25</result>