In a cuboid glass tank measuring 5 decimeters long and 4 decimeters wide from the inside, the water surface is 10 centimeters deep. Now put a cylinder of iron in it, and the water level rises by 2 cm. What is the volume of this iron block in cubic centimeters?
在一个从里面量长5分米，宽4分米的长方体玻璃缸中，水面深10厘米．现在里面放入一个圆柱体铁块，水面上升了2厘米．这铁块的体积是多少立方厘米？
<gadget id="calculator">5 * 10</gadget>
<output>50</output>

<gadget id="calculator">4 * 10</gadget>
<output>40</output>

<gadget id="calculator">50 * 40 * 2</gadget>
<output>4_000</output>

<result>4_000</result>