The central angle is 90. The area of the sector is 8.96 square centimeters, what is the area of the circle where it lies.
圆心角为90．的扇形面积为8.96平方厘米，它所在圆的面积是多少．
<gadget id="calculator">90 / 360</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">8.96 / (1/4)</gadget>
<output>35.84</output>

<result>35.84</result>