An irregular iron block is completely submerged in a cylinder filled with water. The diameter of the cylinder is 8 cm, and the height of the water is 6 cm. After the iron block is taken out, the water drops by 1 cm. What is the volume of the iron block dm**3?
一个不规则铁块完全淹没在一个装有水的圆柱体中，圆柱体直径为8厘米，水高6cm铁块拿出后水下降了1cm，铁块体积是多少dm**3？
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">3 / 1_000</gadget>
<output>3/1_000 = around 0.003</output>

<gadget id="calculator">3.14 * 16 * (3/1_000)</gadget>
<output>0.15072</output>

<result>0.15072</result>