In a cuboid container with a length of 60dm and a width of 15dm, there is water 20dm deep. If a cube iron block with a side length of 3dm sinks in the water, how many decimeters will the container be water deep at this time?
在一个长60dm，宽15dm的长方体容器中，有20dm深的水，如果在水中沉入一个棱长3dm的正方体铁块，这时容器水深多少分米？
<gadget id="calculator">3 * 3 * 3</gadget>
<output>27</output>

<gadget id="calculator">60 * 15</gadget>
<output>900</output>

<gadget id="calculator">27 / 900</gadget>
<output>3/100 = around 0.03</output>

<gadget id="calculator">(3/100) + 20</gadget>
<output>2_003/100 = around 20.03</output>

<result>2_003/100 = around 20.03</result>