A square iron block with a side length of 20 cm is forged into a rectangular parallelepiped iron sheet with a length of 50 cm and a width of 20 cm. How thick is the rectangular parallelepiped iron sheet?
把一个棱长是20cm的正方体铁块锻造成一个长50cm、宽是20cm的长方体铁皮，长方体铁皮厚多少cm？
<gadget id="calculator">20 * 20 * 20</gadget>
<output>8_000</output>

<gadget id="calculator">20 * 50</gadget>
<output>1_000</output>

<gadget id="calculator">8_000 / 1_000</gadget>
<output>8</output>

<result>8</result>