The side length of a cube container is 10 cm, and there is a cuboid iron block with a length of 2 cm, a width of 1 cm, and a height of 0.5 cm in the container. After the container is filled with water, the iron block is taken out. How much does the water level drop? centimeter?
一个正方体的容器棱长是10厘米，容器内放有一块长是2厘米，宽是1厘米，高是0.5厘米的长方体的铁块，容器放满水后，把铁块从中取出，水面下降多少厘米？
<gadget id="calculator">10 * 10</gadget>
<output>100</output>

<gadget id="calculator">0.5 / 100</gadget>
<output>0.005</output>

<gadget id="calculator">2 * 1 * 0.005</gadget>
<output>0.01</output>

<result>0.01</result>