A circle and a sector have the same radius, the area of the known circle is 30 square centimeters, and the central angle of the sector is 36°. Find the area of the sector.
一个圆和一个扇形的半径相等，已知圆的面积是30平方厘米，扇形的圆心角是36°．求扇形的面积．
<gadget id="calculator">30 / 3.14</gadget>
<output>9.55414</output>

<gadget id="calculator">36 * 3.14 * 9.55414</gadget>
<output>1_079.999986</output>

<gadget id="calculator">1_079.999986 / 360</gadget>
<output>3</output>

<result>3</result>