Cast an iron block with an edge length of 8dm into a cuboid with a length of 10dm and a width of 4dm. What is the height of the cast iron block?
把一个棱长8dm铁块铸成一个长10dm，宽4dm的长方体，铸成的这个长方体铁块的高是多少分米？
<gadget id="calculator">10 * 4</gadget>
<output>40</output>

<gadget id="calculator">8 / 40</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">8 * 8 * (1/5)</gadget>
<output>64/5 = around 12.8</output>

<result>64/5 = around 12.8</result>