A water tank measures 30cm in length, 10cm in width, 2dm in height, and 10cm in water depth. After putting in a steel block, the water level rises by 4cm. What is the volume of the steel block?
一个水槽，量得里面的长30cm，宽10cm，高2dm，里面水深10cm，放入一个钢块后，水面上升了4cm，钢块的体积是多少？
<gadget id="calculator">30 * 10 * 4</gadget>
<output>1_200</output>

<result>1_200</result>