The perimeter of the bottom surface of a cylindrical container submerged with an irregular iron block is 62.8 cm. After the iron block is taken out of the container, the water level drops by 3 cm. What is the volume of this iron block?
浸没着一块不规则铁块的圆柱形容器的底面周长为62.8厘米，把铁块从容器中取出后，水面下降了3厘米，这块铁块的体积是多少？
<gadget id="calculator">62.8 / 3.14 / 2</gadget>
<output>10</output>

<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">3.14 * 100 * 3</gadget>
<output>942</output>

<result>942</result>