A circular fish pond has a circumference of 28.26m measured from the inside and a depth of 1.2m. What is its volume in m**3?
一个圆形养鱼池，从里面量得底面周长是28.26m，深1.2m，它的容积是多少m**3？
<gadget id="calculator">28.26 / 3.14 / 2</gadget>
<output>4.5</output>

<gadget id="calculator">4.5 ** 2</gadget>
<output>20.25</output>

<gadget id="calculator">3.14 * 20.25 * 1.2</gadget>
<output>76.302</output>

<result>76.302</result>