If the arc length of the sector is 3.14cm and the radius is 2cm, what is the area of the sector in cm**2.
如果扇形的弧长等于3.14cm，半径为2cm，那么这个扇形的面积是多少cm**2．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) * 3.14 * 2</gadget>
<output>3.14</output>

<result>3.14</result>