A conical metal casting with a base radius of 9 cm is immersed in a cylindrical container with a base radius of 10 cm. As a result, the water level rises by 2 cm. Find the volume of the conical casting.
把一个底面半径9厘米的圆锥形金属铸件浸没在一个底面半径为10厘米的圆柱形容器中，结果水面比原来升高了2厘米，求这个圆锥形铸件的体积．
<result>628</result>