Given that the arc length of the sector is 15.7 cm and the radius is 6 cm, what is the area of the sector in square centimeters?
已知扇形的弧长为15.7厘米，半径为6厘米，那么扇形的面积是多少平方厘米．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) * 15.7 * 6</gadget>
<output>47.1</output>

<result>47.1</result>