If the central angle of a sector is 60° and the radius is 6cm, what is the area of the sector in cm**2.
如果一个扇形的圆心角为60°，半径为6cm，那么这个扇形的面积是多少cm**2．
<gadget id="calculator">6 ** 2</gadget>
<output>36</output>

<gadget id="calculator">60 * 3.14 * 36</gadget>
<output>6_782.4</output>

<gadget id="calculator">6_782.4 / 360</gadget>
<output>18.84</output>

<result>18.84</result>