The length of the glass tank is 12dm, the width is 6dm, the height is 18dm, and the depth of the water in the tank is 8dm. If a cube iron block with a side length of 6dm is put into the glass tank, how many decimeters will the water level rise after it is completely submerged?
玻璃缸长12dm，宽6dm，高18dm，缸中水深8dm，把一个棱长是6dm的正方体铁块放入玻璃缸中，完全淹没之后水面上升了多少分米？
<gadget id="calculator">12 * 6</gadget>
<output>72</output>

<gadget id="calculator">6 / 72</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">6 * 6 * (1/12)</gadget>
<output>3</output>

<result>3</result>