The radius of the bottom surface of a cylindrical container is 6 cm. An irregular iron block is placed in the container. After the iron block is taken out, the water level drops by 3 cm. What is the volume of this block of iron?
一个圆柱形容器的底面半径是6厘米，容器中放着一块不规则的铁块，取出铁块后水面下降3厘米．这块铁块的体积是多少？
<gadget id="calculator">6 ** 2</gadget>
<output>36</output>

<gadget id="calculator">3.14 * 36 * 3</gadget>
<output>339.12</output>

<result>339.12</result>