If the inner radius of a circle is 8 cm and the width of the ring is 6 cm, what is the area of the circle in square centimetres?
一个圆环内半径为8厘米，环宽6厘米，则该圆环的面积是多少平方厘米．
<gadget id="calculator">8 + 6</gadget>
<output>14</output>

<gadget id="calculator">14 ** 2</gadget>
<output>196</output>

<gadget id="calculator">3.14 * 196</gadget>
<output>615.44</output>

<gadget id="calculator">8 ** 2</gadget>
<output>64</output>

<gadget id="calculator">3.14 * 64</gadget>
<output>200.96</output>

<gadget id="calculator">615.44 - 200.96</gadget>
<output>414.48</output>

<result>414.48</result>