A fan-shaped pool has a radius of 2 meters and a perimeter of 5.14 meters. What is the area of the pool in square meters?
扇形水池半径为2米，周长为5.14米，这个水池的面积为多少平方米．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) * 1.14 * 2</gadget>
<output>1.14</output>

<result>1.14</result>