In a rectangular container 30 decimeters long and 20 decimeters wide, there is water 5 decimeters deep. Now sink a square iron block with a side length of 30 cm into the water. How many decimeters is the water depth in the container at this time?
在一个长30分米，宽20分米的长方形容器中，有5分米深的水．现在在水中沉入一个棱长30厘米的正方体铁块，这时容器中水深多少分米？
<gadget id="calculator">30 / 10</gadget>
<output>3</output>

<gadget id="calculator">3 * 3 * 3</gadget>
<output>27</output>

<gadget id="calculator">30 * 20</gadget>
<output>600</output>

<gadget id="calculator">27 / 600</gadget>
<output>9/200 = around 0.045</output>

<gadget id="calculator">(9/200) + 5</gadget>
<output>1_009/200 = around 5.045</output>

<result>1_009/200 = around 5.045</result>