rectangular parallelepiped glass tank measures 8dm in length, 6dm in width, 4dm in height and 3.5dm in water depth. If a cube iron block with a side length of 3dm is placed in it, how many liters of water will overflow in the tank?
一个长方体玻璃缸，从里面量长8dm，宽6dm，高4dm，水深3.5dm，如果放入一个棱长为3dm的正方体铁块，缸里的水会溢出多少升？
<gadget id="calculator">3 * 3 * 3</gadget>
<output>27</output>

<gadget id="calculator">8 * 6 * 3.5</gadget>
<output>168</output>

<gadget id="calculator">8 * 6 * 4</gadget>
<output>192</output>

<gadget id="calculator">168 - 192</gadget>
<output>-24</output>

<gadget id="calculator">27 + (-24)</gadget>
<output>3</output>

<result>3</result>