An iron ball is submerged in a cube container with side length 3dm filled with water. The height of the water surface rises from 16cm to 18cm. What is the volume of the iron ball in cubic centimeters?
铁球浸没在一个盛水的棱长3dm的正方体容器里，水面的高度由16cm涨到18cm，这个铁球的体积是多少立方厘米．
<gadget id="calculator">3 * 10</gadget>
<output>30</output>

<gadget id="calculator">18 - 16</gadget>
<output>2</output>

<gadget id="calculator">30 * 30 * 2</gadget>
<output>1_800</output>

<result>1_800</result>