There is a circular flower bed with a radius of 10m in the center of the square. What is the floor area of this flower bed in m**2.
广场中央有一个半径10m的圆形花坛，这个花坛的占地面积是多少m**2．
<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">3.14 * 100</gadget>
<output>314</output>

<result>314</result>