Master Zhang’s house has a fish tank with a length of 8dm, a width of 6dm, and a height of 5dm. The water depth inside is 20cm. After putting a few fish, the water depth is 25cm. What is the volume of these fish in dm**3?
张师傅家有一个长8dm、宽6dm、高5dm的鱼缸，里面的水深20cm，放入几条鱼后，水深是25cm，这些鱼的体积是多少dm**3？
<gadget id="calculator">25 / 10</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">20 / 10</gadget>
<output>2</output>

<gadget id="calculator">(5/2) - 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">8 * 6 * (1/2)</gadget>
<output>24</output>

<result>24</result>