A cuboid iron block is submerged in a cylindrical glass tank with a bottom area of 50 square centimeters. At this time, the water level rises by 4 centimeters. What is the volume of this cuboid in cubic centimeters?
将一个长方体的铁块，浸没在底面积是50平方厘米的圆柱形玻璃缸里，这时水面上升了4厘米．这个长方体铁块的体积是多少立方厘米？
<gadget id="calculator">50 * 4</gadget>
<output>200</output>

<result>200</result>