Measure the volume of a spherical iron block with a cuboid container whose bottom is a square with a side length of 8 cm and a height of 16 cm. The water contained in the container is still 2 cm away from the mouth of the cup. When the iron block is put into the container, part of the water overflows. When the iron block is taken out, the water level drops by 5 cm. Find the volume of the spherical iron block.
用一个底面是边长8厘米的正方形，高为16厘米的长方体容器，测量一个球形铁块的体积，容器中装的水距杯口还有2厘米．当铁块放入容器中，有部分水溢出，当把铁块取出后，水面下降5厘米，求球形铁块的体积．
<gadget id="calculator">5 + 2</gadget>
<output>7</output>

<gadget id="calculator">8 * 8 * 7</gadget>
<output>448</output>

<result>448</result>