Zhao Jing's family has a glass fish tank with a length of 40 cm and a width of 25 cm, and the water depth inside is 20 cm. One day, Zhao Jing accidentally dropped a cube of iron with a side length of 10 centimeters into the tank. Do you know how many centimeters the water level in the tank will rise?
赵静家有一个长40厘米、宽25厘米的玻璃鱼缸，里面的水深为20厘米．一天赵静不小心将一块棱长为10厘米的正方体铁块掉入缸中，你知道缸中的水面会上升到多少厘米吗？
<gadget id="calculator">10 * 10 * 10</gadget>
<output>1_000</output>

<gadget id="calculator">40 * 25</gadget>
<output>1_000</output>

<gadget id="calculator">1_000 / 1_000</gadget>
<output>1</output>

<gadget id="calculator">1 + 20</gadget>
<output>21</output>

<result>21</result>