A rectangular glass tank with a length of 50 cm, a width of 40 cm, and a height of 30 cm is filled with water at a depth of 20 cm, and a block of iron (fully submerged) is placed in it. At this time, the depth of the water is 25 cm. What is the volume of the block of iron in cubic centimeters?
一个长50cm，宽40cm，高30cm的长方形玻璃缸中，装有20cm深的水，放入一块铁块(全部浸没)，此时水深25cm，这块铁块的体积是多少立方厘米？
<gadget id="calculator">25 - 20</gadget>
<output>5</output>

<gadget id="calculator">50 * 40 * 5</gadget>
<output>10_000</output>

<result>10_000</result>